Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b0affc9ed1b807…

MALICIOUS

PDF

48.0 KB Created: 2020-08-06 02:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db4f381d5a0bd6c605b421fde4c1268b SHA-1: a9436a883636b49029dd918a2a3313eecde4dd5e SHA-256: 04b0affc9ed1b80705c7cc522d19dc7b5fe4db2770d6164910d4dd23bc078300
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) which is flagged as malicious. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, suggesting an attempt to lure users to malicious infrastructure. The presence of a large number of external links, many of which are PDFs hosted on various domains, indicates a link farm or SEO poisoning tactic, likely to obscure the malicious redirector.

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.cc/pify?keyword=cellule+animale+et+v%25C3%25A9g%25C3%25A9tale+diff%25C3%25A9rence+pdf
    • http://files.leespawsandclawsshelter.org/uploads/1/3/1/4/131454620/peselumevorebe.pdf
    • http://files.firstmedicalprototype.com/uploads/1/3/2/6/132695575/vamatovej-zabojefimolen.pdf
    • http://files.nikkileon.de/uploads/1/3/2/7/132712006/bujudulu.pdf
    • http://files.stkittswatersafaris.com/uploads/1/3/0/8/130814535/81b1f28aa426b.pdf
    • http://fijorese.arboristabroad.com/uploads/1/3/0/7/130776487/gizirisikisax-gutobekekob-furojenasa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/41116407728.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/kb_mb_gb.pdf
    • https://cdn.shopify.com/s/files/1/0437/2457/0792/files/70667493376.pdf
    • https://cdn.shopify.com/s/files/1/0435/8540/5089/files/94594053147.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/wajisewexemumava.pdf
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/74323402674.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/54333944436.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/burp_suite_full_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/9586/8057/files/3958224764.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/vitaxotumafadiviriwiro.pdf
    • https://cdn.shopify.com/s/files/1/0436/4346/9974/files/23529252144.pdf
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/35300860761.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_off00007939.bin
b96dfda75660da8936d70fa314d1f84b23bc33dea3fcdd988dc0db5dad38264b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7939 5404 bytes
font_01_sfnt_off00008b4d.bin
dda57a15447e226db07450022a6a70aff612cf1824b3ab0f7be23ad2d3095c0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4D 11756 bytes

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