Malicious PDF — malware analysis report

Static analysis result for SHA-256 0384d0ac2fe1eb2d…

MALICIOUS

PDF

39.5 KB Created: 2020-08-16 16:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c5fbd9bd3ed76ee99c90afb9ae3b60f SHA-1: 3e4989370c3c7de1024f508a94dae53bb30ebe49 SHA-256: 0384d0ac2fe1eb2d61989a7f432a88173d6dfe897082ef6cc47d412e95493ee5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly indicated maliciousness, supporting the presence of malicious links.

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=balloon+movie++tamilplay
    • http://tukoj.theedgesalontxk.com/uploads/1/3/1/6/131606419/malemigo.pdf
    • http://files.dollargeneralpennylist.com/uploads/1/3/1/3/131378975/7161248.pdf
    • http://rogitugud.fccflorida.org/uploads/1/3/0/7/130738554/ginalo_kasofunojep_faluwilapudek_pudemil.pdf
    • http://nomek.emmanuelsa.com/uploads/1/3/1/3/131378950/punuzifof.pdf
    • http://bakuviw.broadreachboatbuilding.com/uploads/1/3/0/7/130776811/nanepalev_jodesozak_mumem_zagedixit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1477/3141/files/89050229387.pdf
    • https://cdn.shopify.com/s/files/1/0436/4828/6880/files/ruxasivono.pdf
    • https://cdn.shopify.com/s/files/1/0437/7133/0709/files/ged_social_studies_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tuwupijisunuxavupo.pdf
    • https://cdn.shopify.com/s/files/1/0447/8353/4229/files/aeneid_virgil_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3845/files/81678176541.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6556/files/alfuzosin_package_insert.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/mupojuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/vosepejopawasobefil.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_off00005f27.bin
cc682252464b4a53f63811d2013db7a6e635fee3b81de74242e8c0d70640d14e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F27 4904 bytes
font_01_sfnt_off00006fd0.bin
48d14c05f995d1260aefa0a267437ba98ee43e5420630dc91a5588d12856ce90
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD0 9896 bytes