Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f2fe82876e0b68f…

MALICIOUS

PDF

46.4 KB Created: 2020-07-08 18:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd428e6266ddf717887150ff9bce7975 SHA-1: 088115c370070d26da74328160dd0ec114adc76b SHA-256: 0f2fe82876e0b68faf98e7f2c344400ce26acc2718daa9dc55782d04e1810977
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one that redirects to a known malicious domain (ttraff.com). The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links to external PDFs, suggesting a link farm or SEO spam campaign. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, likely serving as a lure to a malicious site.

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.com/wb?keyword=constitution%20101st%20amendment%20act%202016%20pdf
    • http://files.earthtorique.com/uploads/1/3/1/4/131454850/nulijujo-zilepi-sepolajep-peburasi.pdf
    • http://files.sdgplanning.com/uploads/1/3/0/7/130739658/widotol.pdf
    • http://files.jenimcray.com/uploads/1/3/1/0/131070911/lakigaxafuzidupu.pdf
    • http://files.lameracandelaria.com/uploads/1/3/1/4/131409709/fosegupumaje_faledapaxu_tolujafevi_savevabizu.pdf
    • http://files.325986690869568534.com/uploads/1/3/1/3/131380158/gadivujifemavoz.pdf
    • http://files.thirdcinemaproductions.com/uploads/1/3/1/3/131379749/sonazez.pdf
    • http://files.shinesocold.com/uploads/1/3/1/3/131380915/fatapob-lugos-nexotipop-kosutabitul.pdf
    • http://files.pinegrovecogop.org/uploads/1/3/0/8/130874318/de351d21ce3806f.pdf
    • http://files.centerforpersonalwellness.com/uploads/1/3/0/8/130874110/6121014.pdf
    • http://files.calojostaffords.com/uploads/1/3/0/9/130969404/kituzere_xavidefumevik_bimaxisimagexaj.pdf
    • http://files.mzsacredhealing.com/uploads/1/3/1/6/131606550/7095557.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://rabujibud.files.wordpress.com/2020/07/diwafobugowuduwedawur.pdf
    • https://volapuzigu.files.wordpress.com/2020/06/57555234519.pdf
    • https://mamudeko.files.wordpress.com/2020/07/20098936505.pdf
    • https://gavomibew482746657.files.wordpress.com/2020/07/kufer.pdf
    • https://virolerimepe.files.wordpress.com/2020/06/luzeguzuzikaj.pdf
    • https://zuvarore.files.wordpress.com/2020/07/96869794458.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kuvesagapixunijibofalase.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.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_off00006d0e.bin
e30f3655ec91a3485e3b8c613f0c8a9d32332bbfbebbc757a98a03d4cc860bb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0E 5560 bytes
font_01_sfnt_off00007fe8.bin
a6445c5f3466b0a7ebba555a2d0e5ef0689604c874bce97f1c26f7590addb754		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE8 14496 bytes

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