Malicious PDF — malware analysis report

Static analysis result for SHA-256 9955c0cce82a7e9e…

MALICIOUS

PDF

34.7 KB Created: 2020-08-11 23:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8f2a749e64df0003d9013f14177a3e32 SHA-1: c2b60cd41840bf119c66a87758cb78af95194db7 SHA-256: 9955c0cce82a7e9e081a6c28dc62d6fefd590456da9d723eb52ddaf1ffb3e488
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text related to 'ecz chemistry past papers pdf' and the malicious URL, suggesting a lure for academic content. The primary malicious URL is https://ttraff.ru/pify?keyword=ecz+chemistry+past+papers+pdf, which likely leads to further malicious content. The presence of many Shopify links, some confirmed benign, suggests an attempt to blend in with legitimate content.

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=ecz+chemistry+past+papers+pdf In PDF document text
    • http://wulete.bayanhajj.com/uploads/1/3/2/6/132681862/jitavulobedegal.pdfIn PDF document text
    • http://files.goldinglandrill.com/uploads/1/3/2/8/132814250/velimi.pdfIn PDF document text
    • http://files.gzastava.com/uploads/1/3/1/1/131164456/12ec067ce8.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/1/0431/3910/4929/files/dunexugura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6377/0272/files/49329541995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5327/6574/files/learning_german_language_ebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0667/3575/files/pradhan_mantri_rural_awas_yojana_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/37033073319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/6523853772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/3532/2526/files/analytical_balance_me204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/61666302074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1610/1793/files/ubqari_magazine_april_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/butarag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7048/8730/files/tapatigoba.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 3

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_off000049ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49EC 5472 bytes
SHA-256: d9a21c08ff53b88d7a289df3b5b265a1ec06a410c6f44c2ebc83e7c215839a93
font_01_sfnt_off00005c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6F 9776 bytes
SHA-256: 7cf7f1c12556fe249c31e76125400c59ed73602dbc876a37753573a549dc1828

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