Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dcb1b35440f8526…

MALICIOUS

PDF

34.0 KB Created: 2020-08-21 18:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 10ddc36188fed26f5eb74f90bb21a996 SHA-1: fa4187c7dd3d1a82563e4d969009880312b9f5c8 SHA-256: 9dcb1b35440f85260f7b89b08093f9f223b88eb044507afcad859816a1cb6b64
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as information on filling out a challan form. The document body and embedded links strongly suggest a lure to a malicious site. The ML classifier also flagged this PDF with high confidence.

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.ru/pify?keyword=how+to+fill+challan+form+32a In PDF document text
    • http://files.wiscopt.com/uploads/1/3/1/4/131410736/8184340.pdfIn PDF document text
    • http://files.threeblockmodel.com/uploads/1/3/2/6/132681392/9929703.pdfIn PDF document text
    • http://files.newburyporthort.org/uploads/1/3/1/4/131453028/mulejunavoparepugi.pdfIn PDF document text
    • http://files.theathomeexperience.com/uploads/1/3/1/4/131409135/famupixani-wizamabubuxiro-tilosunon-dinifuvu.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/1/0431/4942/6845/files/54591776944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/suxidojodamumijamisafeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2554/5890/files/bel_ami_maupassant_resume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8610/9086/files/merge_pdfs_function_in_r.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/36279920135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5238/7739/files/85588355330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0729/5140/files/adobe_reader_11._0._11.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/0732/8675/files/36619304966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/nejeposujavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8417/5773/files/michelle_beatles_piano_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4369/1419/files/doxezebinat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8846/9398/files/89036824522.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 7

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_off000048c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48C8 5292 bytes
SHA-256: 562e4033c56e526aec16f4a6e93cd76635a76366308db4e7eb9e10bbcea438e3
font_01_sfnt_off00005aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA5 9480 bytes
SHA-256: 96bf250750a138cce237382cf6b4dece95a472794fda61e485e71333e42a3280

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