Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fbc7480b075e3d7…

MALICIOUS

PDF

46.7 KB Created: 2020-08-21 02:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26cfef7f73f7251ee739642a54662795 SHA-1: a27875aaa9fbcb5916dc1731695231b76b355fb9 SHA-256: 5fbc7480b075e3d7f73cc1da029acd9cf1852454302b9ad9cb67c9ff16aa38a7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=bible+timeline+chart+pdf`. It also exhibits characteristics of a PDF SEO link farm, embedding numerous links to other PDF files, many hosted on Shopify. The document body, though heavily obfuscated, contains the redirector URL and several benign Shopify URLs, suggesting a deceptive lure to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.cc/pify?keyword=bible+timeline+chart+pdf
    • http://zasana.beestonartsmanagement.com/uploads/1/3/1/4/131437604/446730b76.pdf
    • http://files.emfernandez.com/uploads/1/3/1/8/131856310/moguj-lakunaro-takudetajizok-gogutowepipe.pdf
    • http://files.seamensexology.com/uploads/1/3/0/7/130775786/lutameb_mikumugug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/sufavivupezirokowekim.pdf
    • https://cdn.shopify.com/s/files/1/0432/5005/7373/files/53676646484.pdf
    • https://cdn.shopify.com/s/files/1/0431/3281/3469/files/vesano.pdf
    • https://cdn.shopify.com/s/files/1/0440/1076/6486/files/barcos_que_vuelan_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0436/1073/4755/files/68536943828.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/all_american_girl_meg_cabot_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/6985/7176/files/36289792126.pdf
    • https://cdn.shopify.com/s/files/1/0428/8777/4374/files/45754503744.pdf
    • https://cdn.shopify.com/s/files/1/0427/8570/2054/files/kinategujuwunesem.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/agroforestry_principles_and_practices.pdf
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/timowedilugurem.pdf
    • https://cdn.shopify.com/s/files/1/0434/7228/9942/files/hindustan_unilever_annual_report.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006249.bin
30e3f13f01c72b2746da877ac43e130cffeea3bd9b081de42331fbe8d8afed81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6249 5084 bytes
font_01_sfnt_off0000734f.bin
2f21d7400398e5cadfcc211e90665e12cb238f2710a0d943e7c64e4604ad273a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x734F 14520 bytes
font_02_sfnt_off0000a02c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA02C 4324 bytes

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