Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8793af730f6b66…

MALICIOUS

PDF

43.0 KB Created: 2020-08-15 00:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8c30fbb4fb00a17b848a41cae6cf317 SHA-1: 886d9566c4a539426c657925a951bafb0364f9be SHA-256: 0f8793af730f6b66b4acfcdb07d53ad7664743c9117e0b6c87d1009fbf590000
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL, 'https://ttraff.cc/pify?keyword=us+air+force+airman+battle+uniform', is flagged as malicious. This suggests the document is designed to lead users to malicious infrastructure, likely as part of a phishing or scam campaign. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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=us+air+force+airman+battle+uniform
    • http://files.rebeccalangston-george.com/uploads/1/3/1/4/131407183/xajiraxe.pdf
    • http://files.movement-intelligence.com/uploads/1/3/1/4/131452811/bf562d1f.pdf
    • http://sexoku.fremonthog2232.com/uploads/1/3/1/4/131453194/471148bd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6300/8664/files/nososazebowevetazu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/zebupozi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7929/5385/files/how_many_liters_to_a_gallon.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/angina_pectoris.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/27979419263.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/waxesoviwekixuves.pdf
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/chitika_meda_chitika_vesara_song_now.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/39078488604.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/athisme_philosophie.pdf
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/palulodej.pdf
    • https://cdn.shopify.com/s/files/1/0432/3164/1767/files/ford_f250_repair_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/8754594335.pdf
    • https://cdn.shopify.com/s/files/1/0436/1761/6034/files/cambridge_english_for_business_communication.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_off00006b39.bin
664f0d9e109e8a019f3748f8a7cd596278d30381887c64979e5881823c2407a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B39 5160 bytes
font_01_sfnt_off00007cac.bin
fb4082a47ae804f7736ae50729b45170c1ca57814125cf4707afa0b4476a0b62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAC 9908 bytes

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