Malicious PDF — malware analysis report

Static analysis result for SHA-256 71b53d27410c63b3…

MALICIOUS

PDF

52.6 KB Created: 2020-10-28 15:49:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 9f479c3db495d5c58962efb341c41a83 SHA-1: 89eb656f0d64a3c1fd623fe0fd4d7d7775833303 SHA-256: 71b53d27410c63b34eaad05b8a81f7fb273f638cc7ff0a47266ecc0ad679dc23
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/123?keyword=loft+additions+orange+county In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5f92b507c59c9.pdfIn PDF document text
    • https://nokurujifeseg.weebly.com/uploads/1/3/4/3/134355409/8226232.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/ragizipusal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387716/normal_5f93b5ed42653.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f88f2626bcf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387031/normal_5f99332e5e5ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388280/normal_5f96168d9a9b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370072/normal_5f8bef641b10d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383923/normal_5f94450620722.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402032/normal_5f912d4d95032.pdfIn PDF document text
    • https://jojavofeze.weebly.com/uploads/1/3/4/3/134395471/waworutunubefutato.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f8708b7983c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006aba.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006aba.bin)
    • http://www.daltonmaag.com/In extracted file (font_03_sfnt_off0000b5d0.bin)
    • https://cdn.shopify.com/s/files/1/0501/6354/8350/files/xagabigizirigamutudol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2263/1067/files/39810737856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/3203/9583/files/carista_obd2_full_apk_cracked.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/xijobid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4093/7896/files/tepamufufunuxolebus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1165/9678/files/pain_level_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0613/8787/files/wejibelixekefima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3998/9141/files/82061679833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0699/2799/files/mipejukuwapidej.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/ganapati_atharvashirsha_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0933/8276/files/vanami.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_off00006aba.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off0000a11a.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off0000a11a.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABA 5080 bytes
SHA-256: fe99cdc1805c1f715836e4bf013887076a4beddaa9fb644293a8f07020f75ddb
font_01_sfnt_off00007c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C16 10888 bytes
SHA-256: 5e7ce4e309e44380760954438f616c067846da5e7639ea01bf7d0bd517811fbe
font_02_sfnt_off0000a11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA11A 16088 bytes
SHA-256: de4163f0fd1d786dd9f436dfe932c333ad362cf0c60848d122a597d9c22621ff
font_03_sfnt_off0000b5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5D0 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230