Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a2f3fd19d8d9e5…

MALICIOUS

PDF

40.8 KB Created: 2020-08-05 02:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c09efaa4c9cf2007d5351a7c1a56d577 SHA-1: 9445c61fcc2aec11aaf963803f89a8429dce0e02 SHA-256: a4a2f3fd19d8d9e5621073f88125fcf54af9189e28d6bb51e4d4e29d918aa080
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDFs hosted on Shopify. One critical heuristic identified a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=speed+velocity+and+acceleration+problems+with+answers+pdf'. This suggests the document is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent.

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=speed+velocity+and+acceleration+problems+with+answers+pdf In PDF document text
    • http://files.southgateanimalhospital.ca/uploads/1/3/1/4/131454221/7703610.pdfIn PDF document text
    • http://files.maniladays.com/uploads/1/3/1/4/131438848/5423177.pdfIn PDF document text
    • http://liriki.signaturetitleservices.net/uploads/1/3/1/3/131384635/mixivikekalipej-kebivawufuxe-masuxabi.pdfIn PDF document text
    • http://files.rainworkskenya.org/uploads/1/3/1/4/131454523/fetolumaw.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/1/0429/9338/5633/files/87482019767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6381/1999/files/pavisunezeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2362/9477/files/63781613105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7964/7903/files/garebewexuwuwagoxefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/kobeletunulosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6289/4498/files/54814143069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/2044177804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8514/3965/files/bederaxakukab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1926/2357/files/online_editor_freeware.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8670/8889/files/98731393800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7388/8671/files/16624456805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7793/5004/files/3021945568.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_off0000613b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613B 5892 bytes
SHA-256: 67d87ada636af9c2d86f57462f3625dc1a2f722d264d54abe977d014ff1ecfb4
font_01_sfnt_off00007532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7532 9616 bytes
SHA-256: a5ca73defcc25802222beca90a640fa6ffea15159be4c18c7055876caff0aaf2

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