Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9c35bc24d315cdf…

MALICIOUS

PDF

49.7 KB Created: 2020-08-10 05:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 44749144eeace34875728b44c7b5f929 SHA-1: a1ea40bfb29ecaa0677a80bca7bbb007e23e4462 SHA-256: b9c35bc24d315cdf0c3e06ae82d6bfe77de866897c6ce7c7aa794dcf2e635d27
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=autocad+pdf+underlay+plot+quality'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The presence of a PDF link farm further supports this, with multiple links to external PDFs, including one to 'https://cdn.shopify.com/s/files/1/0436/1024/3229/files/jasan.pdf'. The document body, though partially corrupted, also contains the malicious redirector URL.

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=autocad+pdf+underlay+plot+quality In PDF document text
    • http://files.mountainapotheca.com/uploads/1/3/0/8/130873907/5489712.pdfIn PDF document text
    • http://files.richardsonlegalpllc.com/uploads/1/3/1/3/131384127/6106404.pdfIn PDF document text
    • http://files.manypaws.org/uploads/1/3/1/3/131378771/9823526.pdfIn PDF document text
    • http://files.bethelgospelchapelca.org/uploads/1/3/0/9/130969983/7694723.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1024/3229/files/jasan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7122/3446/files/aiag_fmea_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0341/2633/files/applicability_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7118/2750/files/teges.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84113106953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3191/2857/files/84164799124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7527/0811/files/bebras_challenge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/facebook_open_graph.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/nakerobalol.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005db8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB8 4032 bytes
SHA-256: 51036caeaaec89de8680405f123e86dc84267b6fe8b2de34ea0e6c667ded1fe3
font_01_sfnt_off00006c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2A 5072 bytes
SHA-256: 50b608aec7718b53c2f3dd1589cec59aca5912f822cde610861420b1801201a3
font_02_sfnt_off00007d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D76 14132 bytes
SHA-256: 3c3a48c4e07bdf21ac3a52941d9beb3013650469721f4c32cef75d8ba70aa020
font_03_sfnt_off0000a95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA95C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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