Malicious PDF — malware analysis report

Static analysis result for SHA-256 9206dd811fa2f168…

MALICIOUS

PDF

49.7 KB Created: 2020-08-02 14:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 25baa51953f9e35fa78c7892ce839738 SHA-1: 98b3f1cab307aadee280367a7096670a48c4e92c SHA-256: 9206dd811fa2f16860ab87b42f2e0268016758978bac58970023d7d6af64dcae
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The primary attack pattern appears to be a link farm designed to either distribute malware or lead users to phishing sites, leveraging the 'SEO Link Farm' technique. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector is a high-confidence indicator.

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=e5%2525+92%2525+b8%2525+e9%2525+b1%2525+bc In PDF document text
    • http://files.scfelix.com/uploads/1/3/0/7/130775328/97db97193d02.pdfIn PDF document text
    • http://files.sweetstreet.info/uploads/1/3/1/4/131407469/7555571.pdfIn PDF document text
    • http://files.en.oslomamma.net/uploads/1/3/0/7/130738751/faluzulojuputo-mezab-solos-xipek.pdfIn PDF document text
    • http://files.burbankbees.com/uploads/1/3/2/6/132681426/6394184.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/1/0432/6676/9051/files/diziludowiduwoli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/wenotapujunukezewav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89120948070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/jipalutuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8837/0072/files/trey_songz_mp3skull.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3455/9143/files/fovozumogixakexovejazasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6709/7756/files/79319281887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4261/9035/files/62230085411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/13209280164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5103/8358/files/81434898022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/17218313802.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6169 5268 bytes
SHA-256: ffa1c1719fc076e8554c8ba81a3e1194f659b0d15b90f376297629585ae61556
font_01_sfnt_off00007362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7362 15368 bytes
SHA-256: 5baf2f3fa83834bbd30f621a136862f9a99a2420df652236c082bb157bf2c3f4
font_02_sfnt_off0000a264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA264 16260 bytes
SHA-256: a56c3305eae8c274f9530afc53b94bb11aea5b2e4106fccae25e6adbba8aa2c3

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