Malicious PDF — malware analysis report

Static analysis result for SHA-256 0413d39910d6316f…

MALICIOUS

PDF

47.7 KB Created: 2020-08-10 13:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 507be033f692bd329de9de41fe19276e SHA-1: b627a1ca2961d04a65e585705ce72119482cb8b0 SHA-256: 0413d39910d6316f662afcb6593013db81fadbf4bf538cd352b8233942d70f68
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One prominent URL, 'https://ttraff.ru/pify?keyword=curso+de+viol%25C3%25A3o+para+iniciante+pdf', is flagged as malicious, indicating a redirection to harmful content. The document body, though partially corrupted, includes the same course title and a malicious URL, reinforcing the lure.

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=curso+de+viol%25C3%25A3o+para+iniciante+pdf
    • http://files.nocontractppc.com/uploads/1/3/0/7/130776247/wavolibewuwubekexo.pdf
    • http://files.melissatisonart.com/uploads/1/3/1/0/131070674/zetijefopupa.pdf
    • http://files.jsiglobalinc.com/uploads/1/3/1/4/131437725/4836894.pdf
    • http://buxibik.robertsfourthwatch.com/uploads/1/3/0/8/130874493/cd9cb60.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/masiwiximim.pdf
    • https://cdn.shopify.com/s/files/1/0428/7420/8419/files/penikibigumojen.pdf
    • https://cdn.shopify.com/s/files/1/0437/6743/1320/files/5301174279.pdf
    • https://cdn.shopify.com/s/files/1/0429/4259/5239/files/xurul.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/75151098579.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/nojam.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/5555379131.pdf
    • https://cdn.shopify.com/s/files/1/0434/2169/6149/files/timex_1440_sports_watch_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0629/files/zivuvevilab.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0805/files/delurureni.pdf
    • https://cdn.shopify.com/s/files/1/0437/2060/5848/files/zadikozoduxerazajaloxupal.pdf
    • https://cdn.shopify.com/s/files/1/0429/1962/4870/files/tixenolugip.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_off000077db.bin
91a8833319663ded8de36d5398efa8ddcc58044576c481028fef255e74164e6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DB 5432 bytes
font_01_sfnt_off000089da.bin
2205952a5aa295c8b35e4bb964e44e401afd58362968da0d0a73e3fe08370893		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89DA 12300 bytes

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