Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f9db320f7965cf8…

MALICIOUS

PDF

41.7 KB Created: 2020-09-13 06:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f5c6772935ff40e18422634e9ad0060e SHA-1: 73a5a551b6066eb894426c8e8b7f231e4def002a SHA-256: 1f9db320f7965cf8c5b6c63ca76a8fb3742447415f6b4c696784c8b4611dfe41
194 Risk Score

Malware Insights

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

The PDF contains a prominent link that, when clicked, redirects to a malicious domain. The document body text, though heavily obfuscated, includes the lure 'Dynamics solution manual 12th edition' and the malicious URL. The PDF was flagged by heuristics for linking to known malicious redirector infrastructure and for being part of a link farm, indicating a phishing or malware distribution attempt.

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.club/wix?keyword=dynamics+solution+manual+12th+edition In PDF document text
    • http://files.tylerhomesnj.net/uploads/1/3/1/4/131484133/ae40232.pdfIn PDF document text
    • http://files.charlesheinerfiction.com/uploads/1/3/0/8/130873875/3662700.pdfIn PDF document text
    • http://files.firstsounds.com/uploads/1/3/1/6/131637055/mifumasen.pdfIn PDF document text
    • http://files.steinhausbernese.com/uploads/1/3/1/0/131071063/8625808.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/1/0428/2214/0063/files/vebukudizodutejawujoribo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1641/9488/files/87103628751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66083684812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7490/3452/files/76639409955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0870/5187/files/jiniwidaromogepebaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/cardboard_sheet_cut_to_size.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2302/2752/files/bijunusibapesavarojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/2914/8327/files/tadokefewuxow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9124/4696/files/36498831146.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b926a8_393f65ed0f6140178d682cc952e1fd03.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/278743_6746822650c04492a9d9081f6c6ecec4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bb4607_dd84ae8fe88c49e08b858b7886e28040.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_off000061b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B8 5368 bytes
SHA-256: 8ffc9d469ce94667e11ee7be0ca1c0a277da50727d0b65857d6ffc615f5a5423
font_01_sfnt_off000073e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E6 11368 bytes
SHA-256: 508d25122f811d1c6e0a6a8569dc710374a3192d56ade1add6ba04702eeb39c3

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