Malicious PDF — malware analysis report

Static analysis result for SHA-256 74430a7002feece0…

MALICIOUS

PDF

50.4 KB Created: 2020-07-31 23:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e1fe66fc4ecc1ad764c48e0d6a2e244 SHA-1: 20f105659ad479549f6471450e81bd6ef4753d14 SHA-256: 74430a7002feece05ad54e0de3d6ba19f205d931aaeb4d66bc4c06b3ff11df17
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, but one critical link redirects to a known malicious domain, ttraff.com. This suggests a link farm or SEO poisoning tactic designed to lure victims to malicious content. The ML classifier also strongly indicated maliciousness.

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=networking+ebooks+pdf
    • http://files.debbiebakker.com/uploads/1/3/1/6/131606762/dijijaliko.pdf
    • http://files.seedsforchangeconsulting.com/uploads/1/3/0/7/130776204/439aeb4ce356.pdf
    • http://files.combslongapcep.com/uploads/1/3/1/3/131378942/pivivofudimav_povisubomulu_nigikupesixup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/9739/1261/files/89828599044.pdf
    • https://cdn.shopify.com/s/files/1/0432/5385/8472/files/figapuxisos.pdf
    • https://cdn.shopify.com/s/files/1/0431/1669/1612/files/90475165122.pdf
    • https://cdn.shopify.com/s/files/1/0430/7510/9013/files/fanosesexekizazowum.pdf
    • https://cdn.shopify.com/s/files/1/0437/6903/6958/files/91257539733.pdf
    • https://cdn.shopify.com/s/files/1/0428/4373/4172/files/57769176131.pdf
    • https://cdn.shopify.com/s/files/1/0435/5204/7272/files/firuxesarufarejoxejekefo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5463/6966/files/41224356887.pdf
    • https://cdn.shopify.com/s/files/1/0434/1553/5774/files/visalobexorejudujap.pdf
    • https://cdn.shopify.com/s/files/1/0437/3194/3585/files/jigupubagor.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1510/files/xuwakuvobiwokobija.pdf
    • https://cdn.shopify.com/s/files/1/0430/3355/9203/files/puwibogikukofik.pdf
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/wuvezi.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_off000078ef.bin
335207a8ba2e9601f957f7b8dd79c329b0ef8a6b19b0cb1f67517fac9b5f02d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78EF 5020 bytes
font_01_sfnt_off00008a2a.bin
79bc545bb0a7c1fcee7b1338e216c2a8edf28ff0191f29758dcb8d546704044e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2A 10656 bytes
font_02_sfnt_off0000aea3.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA3 4324 bytes

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