Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ae14c2b71249fd…

MALICIOUS

PDF

43.6 KB Created: 2020-08-14 13:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 72e6c17060116fbfc588e239a5855142 SHA-1: e434abaef91d6fa9b37d0df7e8ab00cf89aefb09 SHA-256: 37ae14c2b71249fd650579475a537444f3b019153cc951f521d96a743392ef16
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to 'elementary book pdf'. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=solution+elementary+book+pdf In PDF document text
    • http://files.esrapglobal.org/uploads/1/3/2/6/132681164/mixobixipeniw.pdfIn PDF document text
    • http://files.eastbrooklynhousing.com/uploads/1/3/2/6/132681194/nusamek.pdfIn PDF document text
    • http://files.theaccountantthatlovestech.com/uploads/1/3/0/7/130740077/b3710930.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/1/0432/0159/3502/files/molofatedefimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/96027865120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9020/5090/files/school_vocabulary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3723/7146/files/purorigekogobukite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/anfotericina_b_complejo_lipidico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7885/2503/files/13067442811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9914/3838/files/78369598635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/fuxunodofa.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 7

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_off00006c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C87 5420 bytes
SHA-256: 27e9aac23d891ff3447b9b0b8e3a08af8ec459ece7e731e1bafa41cccbc96da5
font_01_sfnt_off00007ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDE 10292 bytes
SHA-256: 5c4253992f912f054a8c95fa355f07a59d0252ddd5f5cad5a817a37823441a09

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