Malicious PDF — malware analysis report

Static analysis result for SHA-256 01274d212876bde1…

MALICIOUS

PDF

32.8 KB Created: 2020-07-09 00:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfecb79a75ed2558f311b7b45e10e3a9 SHA-1: bb4b4bb8bec759b34b04c8990216ff1ac4fe79b5 SHA-256: 01274d212876bde1c8cde7380e23af3054b1003cdf244f5063a9cb821888b3ee
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, masquerading as a service manual, which are designed to redirect users to malicious websites. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags the URL 'https://ttraff.com/wb?keyword=2009%20matrix%20service%20manual' as pointing to known malicious infrastructure. 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/wb?keyword=2009%20matrix%20service%20manual
    • http://files.artemleaders.com/uploads/1/3/0/7/130775116/e5839db.pdf
    • http://files.holistichealthactivation.com/uploads/1/3/1/4/131437778/1409502.pdf
    • http://files.vomhiddencreek.com/uploads/1/3/1/6/131606127/kukuko.pdf
    • http://files.rockyroadduo.com/uploads/1/3/1/1/131164252/c4efddbfedf.pdf
    • http://files.quasilocum.com/uploads/1/3/1/3/131380733/dazepip-tefifipipewesex.pdf
    • http://files.waiheelimu.org/uploads/1/3/1/6/131607174/nomuvawezilamaranu.pdf
    • http://files.celiamai.com/uploads/1/3/1/4/131406108/449b2eb758.pdf
    • http://files.mrskenny.com/uploads/1/3/0/7/130739377/4593132.pdf
    • http://files.willowfree.ca/uploads/1/3/0/7/130740344/xiwodufa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://sifuvuviluz.files.wordpress.com/2020/06/paxanonuragabitazalijurar.pdf
    • https://talujudi.files.wordpress.com/2020/07/12410382652.pdf
    • https://wekekikozet.files.wordpress.com/2020/07/85875639903.pdf
    • https://gunurineso.files.wordpress.com/2020/06/43500726084.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vinujavezo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zijuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78046530146.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_off0000451f.bin
0a764a38d0f809d799a57683a02ed33a57053cefa56a75acb12a8bbbdbad708d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x451F 5180 bytes
font_01_sfnt_off0000569d.bin
f6b9263b4e66bafebf7ee9583819008562d79a12fde1ad4b9353865ee92b046d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x569D 9004 bytes

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