Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc0cf2782a3cc5e…

MALICIOUS

PDF

54.4 KB Created: 2020-07-09 13:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e69f103eb7414f3841aca11df34e37c SHA-1: 59e2288056f97e398a3681d1a5ce273c724b3061 SHA-256: 0fc0cf2782a3cc5e6bdd8c95b37cb9f40a25ed42bfca70c97d4e71240d6c3ee3
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One prominent link, 'https://ttraff.com/wb?keyword=homomorphism%20abstract%20algebra%20pdf', appears to be a redirector to malicious infrastructure. The document's structure and the sheer volume of outbound links suggest a link farm or SEO poisoning tactic designed to drive traffic to malicious sites, likely for further exploitation or malware delivery.

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=homomorphism%20abstract%20algebra%20pdf
    • http://files.indestructibleglowbaits.com/uploads/1/3/1/4/131454024/982a977ae.pdf
    • http://files.laketenkiller.com/uploads/1/3/1/3/131384599/551776.pdf
    • http://files.brisbanewritelinks.com/uploads/1/3/1/4/131409884/daterirajorovuta.pdf
    • http://files.vomhiddencreek.com/uploads/1/3/1/6/131606127/kukuko.pdf
    • http://files.coxevolab.org/uploads/1/3/1/3/131380733/b435077a189.pdf
    • http://files.panisangelicuspress.com/uploads/1/3/1/3/131384018/7094245.pdf
    • http://files.elementalascension.com/uploads/1/3/1/6/131606550/venobikip.pdf
    • http://files.teenchallengeofnewmexico.com/uploads/1/3/1/4/131409024/be49a9fe6fe362.pdf
    • http://files.mairibudreau.com/uploads/1/3/0/7/130776864/ziwawajobigogefivane.pdf
    • http://files.bishopgumbleton.com/uploads/1/3/1/3/131379371/tokasinipegog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://saguwer.files.wordpress.com/2020/06/64422024447.pdf
    • https://vojedegij.files.wordpress.com/2020/07/zosapusojupewetow.pdf
    • https://gakumaditu.files.wordpress.com/2020/07/wazujunegaferajosi.pdf
    • https://kudikinojov.files.wordpress.com/2020/06/13908859821.pdf
    • https://pegepev.files.wordpress.com/2020/06/lazuwatemoduremegazos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xatet.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/85450973079.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d99.bin
e0743f480066c3493ee36687d6e084a0e7d0891492a6ca883255b8a23285cb54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D99 5352 bytes
font_01_sfnt_off00008fc1.bin
f9c25ccb0418e1eadd6d5bcebb7670cac7ba4f0925f18bdbc5d7d4dbc08f8731		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC1 10512 bytes
font_02_sfnt_off0000b407.bin
5b8627607192b16bd7c47a226570bc6cdf390a1d7e6cf13dc1076d95515fc77d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB407 16956 bytes

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