Malicious PDF — malware analysis report

Static analysis result for SHA-256 183a483ecd4e2588…

MALICIOUS

PDF

46.3 KB Created: 2020-08-10 04:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc7b4478cc3f144b24702a58eaef0fbb SHA-1: 9b55534182c813abe90e5ac47b838c243a2825ed SHA-256: 183a483ecd4e2588604569a238e938d6b9fb2cee4809b21fcf99985e26b065f7
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate PDF downloads, but the primary link redirects to malicious infrastructure. The embedded URL `https://ttraff.cc/pify?keyword=articles+in+english+grammar+pdf+download` is a known malicious redirector. This suggests the document is part of a phishing campaign aiming to lead users to malicious sites.

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=articles+in+english+grammar+pdf+download
    • http://files.alaskaseakayaking.org/uploads/1/3/2/7/132712514/325310.pdf
    • http://files.buildingbrilliantlives.com/uploads/1/3/1/3/131383648/3008167.pdf
    • http://faxesawi.unlimitedpotentialaz.org/uploads/1/3/1/6/131636725/2f025f6b.pdf
    • http://files.stockmi.com/uploads/1/3/1/3/131380480/1417032.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6644/1376/files/99017363012.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/apocrifos_del_antiguo_testamento_tomo_i.pdf
    • https://cdn.shopify.com/s/files/1/0434/9421/1750/files/how_to_crack_a_geode.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3288/files/thyroid_disease_during_pregnancy_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0430/8752/8103/files/hunter_guide_wow.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6257/files/vogatamobepuwidav.pdf
    • https://cdn.shopify.com/s/files/1/0435/0381/2773/files/55203095284.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/causas_de_amilasemia.pdf
    • https://cdn.shopify.com/s/files/1/0428/4363/5879/files/tijulepisaneluzej.pdf
    • https://cdn.shopify.com/s/files/1/0433/6346/7414/files/noxanomef.pdf
    • https://cdn.shopify.com/s/files/1/0436/7345/2697/files/best_fallout_4_vr_mods.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/64306484301.pdf
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/68908857774.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_off00007650.bin
912775ca08339740a87674e46b8b63dae37964a160c432792c63d30a7b28062d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7650 5652 bytes
font_01_sfnt_off00008970.bin
9d7dbf1b2e62c60f41a5162e8001197cb06a5261e6638bf5be54702668d41e15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8970 10128 bytes

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