Malicious PDF — malware analysis report

Static analysis result for SHA-256 7686bb8cca892f9d…

MALICIOUS

PDF

42.7 KB Created: 2020-08-03 14:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3450284a421695eedaca480186cf7870 SHA-1: ebc961574c7fed139128b2ce0d65ba27f209308d SHA-256: 7686bb8cca892f9d13e9a1ec1b07b239a72e029bc77ee253be36cf09b88138b1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as an IELTS vocabulary PDF. The document also includes a large number of links to other PDFs hosted on Shopify, likely as part of a link farm to improve SEO for malicious content. No scripts were extracted, but the presence of the malicious redirector and the link farm strongly suggests a phishing or scam 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=ielts+vocabulary+words+with+meaning+in+punjabi+pdf
    • http://files.alwayslovedal.com/uploads/1/3/1/1/131164479/gojototevumeken_nividujudajeman.pdf
    • http://files.angelwolfcomics.com/uploads/1/3/1/0/131070920/lubizej_sodiv_kewagafon.pdf
    • http://files.slidemash.com/uploads/1/3/0/8/130874110/550f2e69bf6c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/5150/7094/files/sawezixinivaxaranisogikoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98973723668.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/fumari.pdf
    • https://cdn.shopify.com/s/files/1/0431/7344/5788/files/xagotoxujupulenuvofo.pdf
    • https://cdn.shopify.com/s/files/1/0439/0577/7832/files/tojuzilijaxazapazizuvofag.pdf
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/juxetirajomozafakuzefab.pdf
    • https://cdn.shopify.com/s/files/1/0435/2419/4468/files/73760281970.pdf
    • https://cdn.shopify.com/s/files/1/0437/2096/6298/files/19263456499.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/43225048184.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0432/files/55753132980.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/12745503007.pdf
    • https://cdn.shopify.com/s/files/1/0429/3876/1379/files/23967550424.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_off00005951.bin
59a6d8c82e1d52ac09423f519f9d60b36ebee5be5f8d8659faee9b72973a2686		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5951 5856 bytes
font_01_sfnt_off00006d30.bin
8e018b4564d76becd73ddf6bacec0268224b3758a4342875e46d3873cd76c84d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D30 10148 bytes
font_02_sfnt_off00008fc8.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC8 4324 bytes

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