Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f5ab46de6ffefab…

MALICIOUS

PDF

63.2 KB Created: 2020-10-28 01:03:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 5618ef7e4aac12e20642f5a50808a2cf SHA-1: 2ef0892b757afb19507a2d97f3f63b2b57cb35b4 SHA-256: 7f5ab46de6ffefab4c00c78257558bc14e93e5509aedc1b95ca9008e4fb02985
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/123?keyword=rise+of+the+shadows+adventure+release+date In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368242/normal_5f95ace9dab90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381529/normal_5f9179bb048a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5f90123c6ce22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f919d8d0e712.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5f8a3197d6a0d.pdfIn PDF document text
    • https://wobafedufuj.weebly.com/uploads/1/3/4/0/134012960/8669b42bfe4c479.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/5722268.pdfIn PDF document text
    • https://gexirirexov.weebly.com/uploads/1/3/0/8/130874239/2304338.pdfIn PDF document text
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/tikowofibimerozinozu.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/wotareropajewub.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000b635.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000b635.bin)
    • https://s3.amazonaws.com/dudigonifu/zugasemokejotewibabo.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/pexevaxidofibid.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/82405386157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/49269866624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6773/6225/files/fb_lite_app_apk_latest_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7487/9642/files/powerscore_gmat_critical_reasoning_bible_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2393/9753/files/machine_independent_macro_processor_features.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8760/8986/files/popular_games_android_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12af9161-6594-4bdb-aed3-3952012eee3e/weird_and_confusing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/553615c0-5443-4c8f-ac29-0a2954354d7a/san_diego_unified_school_district_human_resources.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2602/2557/files/definicion_de_talleres.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/health_benefits_of_jackfruit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8526/1717/files/sevabokonorolurepege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1469/6355/files/kruti_dev_font_keyboard.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_off0000b635.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB635 5152 bytes
SHA-256: ed23d54f077f17631d2fbb02250c03ca4935f4551d33e1ab0739fbf61b64076f
font_01_sfnt_off0000c7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C5 12260 bytes
SHA-256: ad41d0bf7d3ea52a85b9fc148a1dc1f397379ef36bc5df18332d56a624dd0c22