Malicious PDF — malware analysis report

Static analysis result for SHA-256 6809fdc8d22a9d95…

MALICIOUS

PDF

47.6 KB Created: 2020-08-08 14:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0623951ebdc960efd7c1f1bba9191cdc SHA-1: 2a7de1b58e43601402c276fbc1ad5aa75eca129a SHA-256: 6809fdc8d22a9d95b5b26dab5450e89e3b385b7ac40aea7274843ff57392b33c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, masquerading as a PDF link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=human+anatomy+and+physiology+12th+edition+pdf', is identified as a malicious redirector. The document's structure and the presence of a malicious redirector indicate an attempt to lead users to harmful content, likely for phishing or malware distribution.

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.ru/pify?keyword=human+anatomy+and+physiology+12th+edition+pdf
    • http://zabafeduk.minhtamcharity.org/uploads/1/3/1/0/131071243/7521635.pdf
    • http://fojete.aaadatacom.com/uploads/1/3/0/8/130814297/3385549.pdf
    • http://wovitet.townsend-rogers.org/uploads/1/3/1/4/131454065/1692705.pdf
    • http://files.rltvet.com/uploads/1/3/2/7/132710783/pudulumoloxafe-ralewowamavamu-baduxutebiw-pitofusi.pdf
    • http://foxas.velez-lab.com/uploads/1/3/0/8/130814297/bikijezosifiduta.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/0577/1939/files/61274455821.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/mercer_weighted_grade_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0430/4453/6473/files/witukotozewadavebanak.pdf
    • https://cdn.shopify.com/s/files/1/0437/5294/7873/files/does_no_mean_no_in_every_language.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0436/8737/9094/files/gonenunilelefimapibusel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17418425376.pdf
    • https://cdn.shopify.com/s/files/1/0428/2014/1223/files/13572444337.pdf
    • https://cdn.shopify.com/s/files/1/0440/8573/9685/files/wapemowubagifid.pdf
    • https://cdn.shopify.com/s/files/1/0434/0829/4039/files/nitijow.pdf
    • https://cdn.shopify.com/s/files/1/0431/4343/0305/files/gozebukuviromaxile.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9841/files/xedisixinevijuvuzuxur.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/8049436562.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_off00006d02.bin
62e872f2bb418008a00dd5f4788b53f9904505d13e7e7eecded85b1d93b20aab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D02 5488 bytes
font_01_sfnt_off00007f91.bin
ae5cf026ab32fec1b3ac0b088db4ed4afe8ce2fbcad838e9e19b641473ccb32d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F91 10308 bytes
font_02_sfnt_off0000a2d0.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2D0 4324 bytes

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