Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d590f73b0e0f24…

MALICIOUS

PDF

35.4 KB Created: 2020-08-07 05:52:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc1727dbd26706e406debc9fcc00a80a SHA-1: 30985671f754d61e00ae2d65b4386934b74f3a88 SHA-256: 05d590f73b0e0f24c1553bf540a9abc74acbe034a1ab82cfdbc8ce05ff64382f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to external PDF files hosted on various domains, suggesting a link farm for SEO manipulation or to host malicious content. One prominent link, 'https://ttraff.cc/pify?keyword=pie+jesu+andrew+lloyd+webber+pdf+free', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, indicating its primary purpose is to redirect users to potentially harmful content.

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=pie+jesu+andrew+lloyd+webber+pdf+free
    • http://files.esterdeboerillustration.com/uploads/1/3/2/3/132303219/521b35d1a9254b9.pdf
    • http://files.sheilawolkart.com/uploads/1/3/0/7/130738524/kejasodag_somijopaguv.pdf
    • http://files.geeandcoltdbuildingconservation.uk/uploads/1/3/2/7/132741535/sikezajanivusad_panabakejebe_rorudexu.pdf
    • http://golegim.vchschool.org/uploads/1/3/0/7/130739835/2692a4a9f10e36.pdf
    • http://files.carterschultz.com/uploads/1/3/1/3/131379099/fosugalokaliku_negiledokoto_kejukisovixoguz_setonidu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/lepejasiloparudibokugi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/62152804822.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/67473924860.pdf
    • https://cdn.shopify.com/s/files/1/0432/4353/6552/files/pobomebakasizag.pdf
    • https://cdn.shopify.com/s/files/1/0429/6962/8828/files/todaralofewowuzumoma.pdf
    • https://cdn.shopify.com/s/files/1/0428/4012/9692/files/58369610425.pdf
    • https://cdn.shopify.com/s/files/1/0433/5842/1142/files/el_autoestima_en_los_adolescentes.pdf
    • https://cdn.shopify.com/s/files/1/0430/0262/6202/files/69045008929.pdf
    • https://cdn.shopify.com/s/files/1/0434/0675/3948/files/ziwuterumo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12457093378.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bd7.bin
eff3c852b43445cedbf141f3cb22ce7314457461e6c084eec2c42f4e54d3bd34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BD7 5444 bytes
font_01_sfnt_off00005e7c.bin
a3b24b7c0786cdec1f002a8088a080cbc955856766643e55430e0dad3ce46661		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7C 10016 bytes

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