Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b503a4de9f295e9…

MALICIOUS

PDF

38.8 KB Created: 2020-08-11 14:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 85fed4a3e5e129e8b63bfe0a8f9fd742 SHA-1: 78374acc1fb751112610317e6263a436a98f127b SHA-256: 9b503a4de9f295e9d0a305166294956e963bedbbf5ba5dac753fb4361ec5f17a
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are disguised as book downloads. One of the primary links, 'https://ttraff.ru/pify?keyword=anesthesia+secrets+5th+edition+pdf', is identified as a malicious redirector. This suggests the document is designed to lead users to malicious sites under the guise of providing free PDF content.

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=anesthesia+secrets+5th+edition+pdf In PDF document text
    • http://files.travelinkcard.com/uploads/1/3/1/4/131437418/2284153.pdfIn PDF document text
    • http://dawak.swkp.org.uk/uploads/1/3/2/8/132814930/7618268.pdfIn PDF document text
    • http://files.lockmangenetics.com/uploads/1/3/0/7/130775383/nizejab.pdfIn PDF document text
    • http://files.elementaryprinciples.net/uploads/1/3/1/6/131637211/fawavaw.pdfIn PDF document text
    • http://files.valuable-autographs.com/uploads/1/3/2/7/132741029/b0d94.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/1/0429/8306/3715/files/88512013800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7977/7945/files/adjectival_phrases_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/38611926486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7359/1703/files/nariku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1136/5288/files/boiler_operator_exam_preparation_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1241/5911/files/59107427076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/dolijejupivapurefizip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/84736191448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/botabivupoxel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3119/7856/files/30561268674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2308/9307/files/kuhnhausen_1911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9462/0837/files/gaxuxo.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_off0000594c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x594C 5324 bytes
SHA-256: c9a924e4348d9135c0bab39e3b7249166c3be6b616ec7f38cea394983f0c4f99
font_01_sfnt_off00006b58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B58 10312 bytes
SHA-256: fe078ce110f09ea07cc79aabbd7bc5338f5f2475cad0768446cc467517c46199

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