Malicious PDF — malware analysis report

Static analysis result for SHA-256 a87ba07c34c37104…

MALICIOUS

PDF

52.4 KB Created: 2020-08-05 14:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c8e52163915a57069002149d67cdec8 SHA-1: 6a498037012feae059a03743f0a17332ce13c44c SHA-256: a87ba07c34c3710491c703fb571be4fa3917692229a13cda0a972b10ae164430
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=baltimore+light+rail+map+pdf', suggesting a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of exploit or malicious content 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.ru/pify?keyword=baltimore+light+rail+map+pdf
    • http://files.airprogerogia.com/uploads/1/3/0/9/130969475/zebusidejov-fawugaziwuna-fegop-juzok.pdf
    • http://files.berksartalliance.com/uploads/1/3/1/3/131383602/fcf355f334004.pdf
    • http://files.newleafhandmade.com/uploads/1/3/0/7/130776225/bopenulog_sowogutob_rumojemula_lugipizulukuja.pdf
    • http://files.partycentralmd.com/uploads/1/3/1/1/131164275/3bae59.pdf
    • http://files.boundfortravel.com/uploads/1/3/1/4/131406036/jikagenazix.pdf
    • http://www.mtanexttrain.net/LATA.MTA.PublicSite
    • https://cdn.shopify.com/s/files/1/0430/8621/7365/files/36234166385.pdf
    • https://cdn.shopify.com/s/files/1/0433/7349/4430/files/74246667702.pdf
    • https://cdn.shopify.com/s/files/1/0429/5262/2236/files/kejilariduxivorimotoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/silver_surfer_cartoon.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6059/files/sadolemukinuvikinawumi.pdf
    • https://cdn.shopify.com/s/files/1/0447/9208/6685/files/bncc_ciencias_naturais.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/13480453305.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/97427034186.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mapiguwidekedod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59044096386.pdf
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/21556885751.pdf
    • https://cdn.shopify.com/s/files/1/0439/1898/3323/files/jekubisugukipege.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7785/files/gis_interview_questions.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e05.bin
f131b696525b1b137dcbc800ced47d2a6f189172747d00c2d10e3a2c56fea394		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E05 5324 bytes
font_01_sfnt_off00009ff6.bin
192385356c7829f6cac51720a0f6cf5123d2f1fb7fd71b84ab4fa830ef5173e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FF6 10624 bytes

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