Malicious PDF — malware analysis report

Static analysis result for SHA-256 a98e8386f7598d6b…

MALICIOUS

PDF

43.3 KB Created: 2020-08-20 20:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 850d848534fedcee2bf3d8a230403150 SHA-1: b3c072cf8ad441887ed0dfe92b70447733866b61 SHA-256: a98e8386f7598d6bf447a817c498dcc5eefcfd2540f308884a2a01ee6e2e94b5
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, a common tactic for SEO link farms and redirecting users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text suggesting an invoice or form lure, further supporting a phishing or scam attempt. The primary malicious URL is https://ttraff.ru/pify?keyword=ae+form+5-+13a, which likely serves as the initial point of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=ae+form+5-+13a In PDF document text
    • http://jowigosa.southcollegeasp.org/uploads/1/3/1/4/131406717/sumukuza.pdfIn PDF document text
    • http://files.scienceroom302.com/uploads/1/3/1/6/131636632/tujelarazoxiweso.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/1/0431/5673/4109/files/27665161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/97657544280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1625/6677/files/puxunuzixifogosivukun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6414/7609/files/bhagavad_gita_chapter_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/capites_de_areia_livro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2158/3004/files/vitaxolovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/81163148055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7969/5517/files/butterbrottten_sterne_vorlagen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7029/9038/files/leluwumevore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/jubojelijudozijuxez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7075/7795/files/29475019788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3676/0485/files/70991917510.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 2

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_off00006b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B88 5064 bytes
SHA-256: 77f5f112c0953773ab22b83801e2e55eacea4f7aef2aa30de646eb762bb7fae3
font_01_sfnt_off00007cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC2 10500 bytes
SHA-256: 2375b8224ee6bcfbd8dcb45b7b2696730d14ee6eed16846796091707befb9495

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