Malicious PDF — malware analysis report

Static analysis result for SHA-256 01952ee1a0c3fdab…

MALICIOUS

PDF

52.4 KB Created: 2020-08-23 18:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04ec9c2883af2b4b8f190956c7e4a60f SHA-1: 570dfc5257211c26471de672ff04119635876a88 SHA-256: 01952ee1a0c3fdab009430cb7cb15cdaf962605a05f3253f33d33809db20d347
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains heuristics indicating it is a malicious redirector and part of an advance-fee scam lure, presenting itself as an answer key. It embeds multiple links, one of which, 'https://ttraff.com/pify?keyword=automobile+insurance+vocabulary+answer+key', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=automobile+insurance+vocabulary+answer+key
    • http://tugazupiz.getstravel.com/uploads/1/3/1/4/131437252/4297895.pdf
    • http://lajubas.tcfrcn.org/uploads/1/3/2/7/132712615/9c27a9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4647/7725/files/six_sigma_green_belt_project_examples.pdf
    • https://cdn.shopify.com/s/files/1/0436/6296/6937/files/16202795644.pdf
    • https://cdn.shopify.com/s/files/1/0437/2368/6056/files/jidasepuna.pdf
    • https://cdn.shopify.com/s/files/1/0432/2151/6449/files/19033035413.pdf
    • https://cdn.shopify.com/s/files/1/0429/3879/4147/files/simomiwuduvejokiwafas.pdf
    • https://cdn.shopify.com/s/files/1/0437/8198/0317/files/51223071558.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/56881890235.pdf
    • https://cdn.shopify.com/s/files/1/0440/6837/2632/files/92439041379.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/dipejine.pdf
    • https://cdn.shopify.com/s/files/1/0434/7333/8533/files/wajinupop.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_off00008ded.bin
91229b01bdbfecb17690fb0d910ce6a76c29083b76ddf01edd4f2a1851c6f470		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DED 5392 bytes
font_01_sfnt_off0000a045.bin
ab39848b3ab0b2b0fc2750c6a144e3ebcd657e65ff491cce287d398bf680a7f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA045 10692 bytes

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