Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1a0145b33f90fb…

MALICIOUS

PDF

38.8 KB Created: 2020-08-17 06:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1ace7796f31802158a6ff78ce97f4de8 SHA-1: 0277c3b6395840841ac39c579eb31ad3e5bfbd71 SHA-256: 1c1a0145b33f90fbca0b54fb96a5789bdb5a1911a1aa913dbcd68ec4b63fde85
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a high number of embedded links. One of these links, 'https://ttraff.cc/pify?keyword=ice+sheet+meaning+in+tamil', points to known malicious redirector infrastructure. The document also contains a large number of links to PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of intent beyond link distribution.

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=ice+sheet+meaning+in+tamil In PDF document text
    • http://files.chemisthompson.com/uploads/1/3/1/4/131438459/jepakunekirip_zifafopo.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/1/0428/4504/4892/files/apstolos_augustus_nicodemus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/gisuwenujosamikajugok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7927/7467/files/pibomubofuforekivosalaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4424/9504/files/88339779650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8920/6174/files/1912602921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/16935991389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5825/7306/files/chemistry_periodic_table_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6533/4165/files/bevimumal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/69066759911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/76973660746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67062005494.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 1

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_off00005ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE9 5052 bytes
SHA-256: 0e8ebcc7c41e72d97dc9b7d2c3e10f969372a663a1f3237e393dbcc77af29b3a
font_01_sfnt_off00006bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF5 10284 bytes
SHA-256: e2252412f6ed938e27d78f2aa8f5b0d42208dd680f705caecc0b1027f871c456

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