Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9a213781b9ac3e9…

MALICIOUS

PDF

39.5 KB Created: 2020-09-12 02:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 178cb655c39e02daf86ffcac97b0b2c9 SHA-1: 7fd0a53a2f8a95bba094d320752df9cb486426e5 SHA-256: a9a213781b9ac3e9aa2dc73a9dd88769fe6edd38897919260696e56ba909f40e
194 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier as malicious and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The document body contains garbled text but also includes the suspicious URL and references to 'bad date format string crystal reports', suggesting a lure or obfuscation tactic.

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.me/wix?keyword=bad+date+format+string+crystal+reports In PDF document text
    • http://vaben.dog-gonefancy.com/uploads/1/3/0/9/130969742/9126038.pdfIn PDF document text
    • http://files.ralflittle.com/uploads/1/3/1/4/131483108/lakeja-tewam-vuboramigusoge.pdfIn PDF document text
    • http://dojapefa.tarrantfatherhood.com/uploads/1/3/2/7/132741136/zovozo-fasujogodere-zemobikub-jilakevejasimo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/3c9ac1_28d4205e7cc24e409b36473d274897b3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2839/7727/files/kiefer_sutherland_net_worth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7880/1822/files/hatchimals_colleggtibles_season_2_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1301/2636/files/lemozogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/performance_appraisal_sentence_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1723/0741/files/jozibepobe.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b27199_1e8a3d5aaab1498486fd98d03552f24d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e2b09b_0cabfea6e7154bdf9af5365386933679.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 5

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_off00005a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1D 5624 bytes
SHA-256: 916decff661003249993c4fac24a273a18b972727c996230c7d7a3a659861891
font_01_sfnt_off00006d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3D 10648 bytes
SHA-256: f601f1c30881afc5eb01801c8b5fa3095b3538ea29ea19f28741f012e1268363

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