Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ea35525ffcffac…

MALICIOUS

PDF

46.6 KB Created: 2020-07-27 18:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 258f7a5e4a8e46a14a95889564a20fa6 SHA-1: b257ef592dc23fa8e58b98b68e6b0fa8476cba58 SHA-256: 37ea35525ffcffac8c0261cd90420a19219e417c6cedd83793096d1d8957af2b
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM. The document body, though heavily obfuscated, appears to contain metadata related to 'wkhtmltopdf' and a search query, suggesting a potential lure. The primary malicious indicator is the presence of a redirector link pointing to 'ttraff.cc', which is likely used to funnel users to malicious 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.cc/pify?keyword=baby+jogger+city+mini+car+seat+manual In PDF document text
    • http://files.globalsustainablewater.org/uploads/1/3/1/4/131453350/4447602.pdfIn PDF document text
    • http://files.setoncrusaderscyo.org/uploads/1/3/0/7/130774962/5233969.pdfIn PDF document text
    • http://files.tropicalbuildershawaii.com/uploads/1/3/2/6/132696056/510020.pdfIn PDF document text
    • http://files.imaginesew.com/uploads/1/3/0/7/130738991/8b76f4c13fd4e6.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/1/0437/6566/1845/files/3698473122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8326/8263/files/2301212899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7502/7619/files/50805212345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9938/1157/files/wumalisezasoxem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5638/1597/files/savituxim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5011/4978/files/61257195805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/gixoguvomugawakegub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/49808152266.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/bominexere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3826/8830/files/39779915007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7797/4678/files/zakineputoza.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 4

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_off000078c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C0 5368 bytes
SHA-256: 500a994168a60ffd62bee3587d35f563fec31550a30012c87056bc8807541a8c
font_01_sfnt_off00008af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF6 10044 bytes
SHA-256: 1be9ab9725fa7a527ff68269587e10d248445b3ec95fa5fd87b87876147a309c

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