Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db29b1803085410…

MALICIOUS

PDF

60.3 KB Created: 2020-08-07 02:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6781a851f1efe7f731566c4c140bced SHA-1: abaeb4f1f8c2e07949cc8c831beb8a24da95de39 SHA-256: 1db29b1803085410c5318ef5a1c12ace7832136b3c3d3a3f714e5c6a733684de
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files. The primary malicious URL identified is https://ttraff.com/pify?keyword=alternative+dispute+redressal+including+arbitration+act+bare+act+pdf, which likely serves as a gateway to further malicious content or phishing pages.

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/pify?keyword=alternative+dispute+redressal+including+arbitration+act+bare+act+pdf
    • http://files.woaorthotics.com/uploads/1/3/1/4/131437246/vazijana_wagibekukipixin.pdf
    • http://files.wheelswaterengines.com/uploads/1/3/1/6/131636995/nobumigikefabot-kovumusujexu-saseza.pdf
    • http://files.macrossanchambers.com/uploads/1/3/2/6/132696060/dekufapejitak_kibafoge_merewom_zufarab.pdf
    • http://files.pucherosoundmachine.com/uploads/1/3/0/7/130776141/9036480.pdf
    • http://wudobemo.splms.org/uploads/1/3/0/8/130874359/58758fd380.pdf
    • https://cdn.shopify.com/s/files/1/0437/3459/7784/files/67697334271.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/nba_basketball_teams_names.pdf
    • https://cdn.shopify.com/s/files/1/0437/5206/3125/files/59764486023.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/22502847547.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/zedudiziduxadagaboxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7490/3452/files/72832393877.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/jumojokawubuvapitujew.pdf
    • https://cdn.shopify.com/s/files/1/0429/5471/9395/files/57016554945.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9908973296.pdf
    • https://cdn.shopify.com/s/files/1/0437/6412/1752/files/34381523570.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aefd.bin
3011774527e3bda131b04ea694323ead21f8279b9f22a6bee16ae77280b228cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEFD 5512 bytes
font_01_sfnt_off0000c1cb.bin
4ad64947b8632328e3cd03400b3006343f51af4a1e35d9fa0a244148dfc35306		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1CB 9868 bytes

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