Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cbbaab2db8a1ff1…

MALICIOUS

PDF

57.4 KB Created: 2020-10-25 05:53:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: c25edb224d705c7e7db5bb71257872d0 SHA-1: 06c36645e046e011410b5c5b85afa2ccbc9e2e62 SHA-256: 6cbbaab2db8a1ff113b6e491e7d93ead231f57ee4b8749cc7c3fb39b65c7943b
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/pify?keyword=polaris+navigation+gps+full+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389586/normal_5f922fe898f25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f87266d7edfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374857/normal_5f91f65b22a84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403805/normal_5f93a0c8295a7.pdfIn PDF document text
    • https://duroxogudoli.weebly.com/uploads/1/3/4/3/134318703/vanusulawepu-tofuw-paxakubosutowa.pdfIn PDF document text
    • https://sowubibuf.weebly.com/uploads/1/3/4/3/134308786/keparaxom.pdfIn PDF document text
    • https://dubutabinagi.weebly.com/uploads/1/3/4/4/134441981/runep-rabike.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00008102.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00008102.bin)
    • https://cdn.shopify.com/s/files/1/0430/4578/1658/files/lorowini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5978/1023/files/appropriate_prepositions_with_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4617/5398/files/kaxoxaxerejigezilaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/9041/7061/files/fat32_format_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5699/5745/files/25900146846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cfc6632-83bd-4eab-abe6-ffa2cec01127/vadefijavifimadekulorodal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69dde5a9-f014-4a16-a3e7-b4bedf0eeff5/chestnut_obstetric_anesthesia_5th_edition_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05230e05-5fcc-4919-8326-43d8738e2bdc/19707461398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/280b3d0d-cc0d-48c4-ba0e-71acaae9c2b6/pexozelaxilodiwotojolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1746/9086/files/ratafonozov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2618/4352/files/dragon_ball_z_capitulo_231.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6444/9431/files/2871361526.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/5769/3091/files/oreck_xl_shield_power_scrubber_troubleshooting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3080/5149/files/87945096779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22b22536-7312-4dd2-a8a1-c3f331bd7db3/sikonosafibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4454418-d195-4162-8334-55c78c5d9d41/78102969671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/809e1074-750a-4250-ad94-cd1caea88a85/kabebemuri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/521b84d7-daf3-435f-bcec-ad00fa2076aa/jazokimitu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off00008102.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_03_sfnt_off0000c0a2.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_03_sfnt_off0000c0a2.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8102 5192 bytes
SHA-256: 51413a111e0790f38446c345cbf67a469eb9aaab81483df9bd6b8b6ac306b6b1
font_01_sfnt_off000092c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92C6 1996 bytes
SHA-256: 175309d29c787bd73e2a5a4bd6e3bb40bb54b82440aa5bc3232f7afbd6522376
font_02_sfnt_off00009c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C4D 10524 bytes
SHA-256: 3c2e179530b87dc2157e0e294e2491c7529922cfefe5feee7a622ea5c67d7020
font_03_sfnt_off0000c0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A2 16396 bytes
SHA-256: 08809b4890280ba35ec108a062f8e212fdf25932677eef5f96d7457ddfa60c82