Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c26f5ee5448401…

MALICIOUS

PDF

61.7 KB Created: 2020-08-02 06:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1eff2d8a9a2836e77dad6c861988e025 SHA-1: bc599245313f171ad7b6daf07131ea7482ea6bbe SHA-256: 78c26f5ee54484015b3ba93f40b59238849828b342676bf90dbcf5789f8257e2
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector link to 'ttraff.com'. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains the target URL and references to SEO link farming, suggesting a tactic to drive traffic to malicious sites. No scripts were extracted, but the presence of embedded URLs points to a phishing or spamming attempt.

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=largest+city+in+usa
    • http://files.wowpartyrentals.org/uploads/1/3/0/8/130814058/fuxejikuravewo.pdf
    • http://files.dennishorseshoes.com/uploads/1/3/2/7/132740270/442f637.pdf
    • http://files.asapbis.com/uploads/1/3/1/0/131070722/jafizijet_junadumagewe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/galuta.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/vukizalapakirubufoluwuko.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zijuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/0543/6326/files/42264514331.pdf
    • https://cdn.shopify.com/s/files/1/0434/2510/4028/files/99365725309.pdf
    • https://cdn.shopify.com/s/files/1/0434/7258/4861/files/university_physics_14th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/lexawubuzaxixekene.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/19000892785.pdf
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/dogewaxigevoresisu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/fezulelazar.pdf
    • https://cdn.shopify.com/s/files/1/0434/7848/3096/files/77540410694.pdf
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/gokixitoluwido.pdf
    • https://cdn.shopify.com/s/files/1/0429/3532/0735/files/72671181978.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_off00009a96.bin
aa8af13d96bc61368299bb72aa28291fa5958cf1b4af202ae5bb0b166000f1bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A96 4752 bytes
font_01_sfnt_off0000aacd.bin
2de20e6ad1ded646711a69b43198d5b26be08823b66a00836660cb4b1d3d21b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAACD 15332 bytes
font_02_sfnt_off0000da57.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA57 4324 bytes

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