Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbfd9068cdffc889…

MALICIOUS

PDF

41.2 KB Created: 2020-08-22 03:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3aa5c333204b4e36df602f022ce048c5 SHA-1: dc3171a4ccce0759f00e698d4cb037a12b8df1dc SHA-256: cbfd9068cdffc889f8b8c3767d2d942283cadc4bee5776c00801789260d3ce04
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with the primary link pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The document body contains garbled text and URLs, further supporting the malicious intent.

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=janapada+geete+songs++kannada In PDF document text
    • http://files.jennamatlin.com/uploads/1/3/1/0/131071114/ginadude.pdfIn PDF document text
    • http://vuvux.mysamcooke.com/uploads/1/3/0/7/130739561/fodepulaxotideruju.pdfIn PDF document text
    • http://files.noticiasinternacionales.net/uploads/1/3/0/8/130874063/wuror-disazixakar.pdfIn PDF document text
    • http://files.threecoursechallengeshs.com/uploads/1/3/0/7/130775997/vovawenupirapapufi.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5128/4642/files/62991300323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51906755497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/kalakoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/acrylic_sheet_cut_to_size.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/6187/4583/files/programmable_logic_controllers_frank_petruzella.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/8624806016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8872/3616/files/12482127801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9899/5877/files/muremimugemarupalaboji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/jomidafudagesa.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 4

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
stream_004_off00005e1a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5E1A 8652 bytes
SHA-256: aa615803eb6243bf8c860fcba50de1cf7c4022c9bec32a8d96cb1bd4f1bb435e
font_00_sfnt_off00004cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CD6 5052 bytes
SHA-256: 93f2d69413f4154c168fffb45cc4e18a27af7fbe150c279ebbddf4cf67ac67c7
font_02_sfnt_off0000774c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x774C 9492 bytes
SHA-256: c827f87c9b2e851b77d472940b5890795a9b2168ebf3189c6fe0acb027430c8c

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