Malicious PDF — malware analysis report

Static analysis result for SHA-256 245ed01c9ba636f8…

MALICIOUS

PDF

46.1 KB Created: 2020-08-03 03:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fb1a6a2daf2ddfc63211634ab8a06f38 SHA-1: 412c8eed48c40e3a1c5c394c54d76d2673dcbb4a SHA-256: 245ed01c9ba636f87a07583e0ebbd3fc2f70f84d4bc58681b5b2516438e53c1c
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 critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are part of a link farm, with one prominent URL pointing to a redirector. This suggests the primary purpose is to lure users to malicious sites.

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=jeppesen+private+pilot+pdf In PDF document text
    • http://files.sarahreneeinc.com/uploads/1/3/2/7/132710717/8348342.pdfIn PDF document text
    • http://files.hufftrax.com/uploads/1/3/1/4/131409909/mareleka.pdfIn PDF document text
    • http://files.thematic-learning.org/uploads/1/3/0/7/130739625/344659459.pdfIn PDF document text
    • http://files.affordingsurrogacy.com/uploads/1/3/1/1/131164048/xezimepuma_matez.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/1/0430/6314/8706/files/betubemurosarizotezupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6653/0728/files/29459035451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3626/2050/files/31484335490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/18377736208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/danedogorolulefumatexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4410/8445/files/roll_a_d20.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0077/4307/files/convert_list_to_dataframe_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/5654634654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6376/9243/files/fagipiganinusiragovolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7313/2954/files/wobazedexajusetegemidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3141/3404/files/rawewerudu.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 8

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_off00006be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE9 5084 bytes
SHA-256: 0ba3caa5c369f4f28152f5e9b2ac7683d876bc682a8775d491a1016366bad6fa
font_01_sfnt_off00007d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D47 14488 bytes
SHA-256: 0573cced85de16d5a5f799899bee4a3f3efc118724aaa855d83cc559282dc168

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