Malicious PDF — malware analysis report

Static analysis result for SHA-256 c522494b6c80dc1d…

MALICIOUS

PDF

39.6 KB Created: 2020-08-16 21:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 62d60eca4e17e1b2e90424ce7f4f39fb SHA-1: 53cbd5502b9be7158c9be3c1be55ee4b13d1a29d SHA-256: c522494b6c80dc1dc14301dc379682022b45f3cac0acc56746e790cf6c4e9792
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, 'https://ttraff.cc/pify?keyword=welding+math+worksheets', which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains references to this redirector URL and other PDF links, suggesting a link farm or redirection 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.cc/pify?keyword=welding+math+worksheets In PDF document text
    • http://files.id-alzo.com/uploads/1/3/1/8/131872015/xolofov.pdfIn PDF document text
    • http://files.storygal.com/uploads/1/3/0/7/130776246/6512994.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/1/0429/9381/1619/files/nepebexon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/11989275771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1638/0831/files/53035283725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/sivinibogeret.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8472/6943/files/routine_english_words_with_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/attachments_rainbow_rowell_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/65054145581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/tim_keller_every_good_endeavor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6052/6246/files/whirlpool_cabrio_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/24638027316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8342/3128/files/92664883236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8575/7606/files/87915454138.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_off00005d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D31 5408 bytes
SHA-256: 4c3dec0c36acee8108298a802e4834efa475af2660d7f35ff7db83e0106b6f22
font_01_sfnt_off00006f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7A 10008 bytes
SHA-256: c1fd0329e26753a9fa0fda30df184cdfe9ca597785948747bbbfab93006c6ea5

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