Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa907a8aa00c1995…

MALICIOUS

PDF

82.3 KB Created: 2020-08-05 14:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 089492642b07ed1058320c30d8fb0904 SHA-1: 764cb0dc67b20aaf68e00dd6e6a0f92e7743c907 SHA-256: aa907a8aa00c1995f827b2e2ac62536ce771b9a45e946c37c642283509f4ba78
194 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier strongly supports maliciousness. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, reinforcing the malicious intent. The primary attack vector appears to be a lure document designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=burrhus+frederic+skinner+pdf In PDF document text
    • http://files.sakinaliterarysociety.com/uploads/1/3/1/6/131606373/xoxuwujefixofan.pdfIn PDF document text
    • http://files.lrvedo.com/uploads/1/3/1/4/131452903/xevot.pdfIn PDF document text
    • http://files.picardvaservices.com/uploads/1/3/0/8/130814245/6517023.pdfIn PDF document text
    • http://files.laepartners.net/uploads/1/3/1/4/131438245/6797d3ca4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4945/8591/files/40756986457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0327/3628/files/67509303670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0936/6427/files/soils_in_construction_5th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8942/8637/files/manufacturing_business_plan_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5026/1915/files/wefakekamiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/zalasogofuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/tabusigukunebodinoderu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8664/2336/files/51097236366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1391/5303/files/73800083828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9979/0243/files/popanixevupotijuvifufaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2412/0984/files/17029372495.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001079e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079E 5116 bytes
SHA-256: 203cd1c1ef6a7745b229710c5d05860f96d627c97c8c173ff8f01d424113f7e7
font_01_sfnt_off00011905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11905 10308 bytes
SHA-256: dcd9a78eff3ecc9bccebee3cff85a61c6e11f4e3757e5de195684cb3b7012387

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