Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbf6231592a53bc…

MALICIOUS

PDF

33.9 KB Created: 2020-08-28 12:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5c66baa6e70e8caf5e526e81e0fff89d SHA-1: 504920e56dcfd077b3af0440a9cb0e82069c1a7d SHA-256: afbf6231592a53bcdca5b51d5f7d2e5aabc1e2d34b2b5270cb29a3a6988d11d4
194 Risk Score

Malware Insights

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

The PDF file contains a deceptive lure for 'free printable holiday colouring pages' which, upon closer inspection, links to a known malicious redirector. The document body is heavily obfuscated but contains the redirector URL. The presence of numerous external links, many pointing to PDF files hosted on various domains, suggests a link farm or redirection scheme designed to obscure the ultimate malicious destination.

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.cc/pify?keyword=free+printable+holiday+colouring+pages In PDF document text
    • http://files.illuminatedsabers.com/uploads/1/3/1/4/131438459/c7353.pdfIn PDF document text
    • http://files.melipeterson.com/uploads/1/3/2/6/132682110/1272670.pdfIn PDF document text
    • http://files.monaghanmentalhealth.com/uploads/1/3/1/4/131437322/jerumerorivugujovowa.pdfIn PDF document text
    • http://files.stbleagues.com/uploads/1/3/2/7/132712324/jojinefevakivuk.pdfIn PDF document text
    • http://files.farmworkerministry.org/uploads/1/3/1/4/131483005/vuragevib.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/1/0428/7578/1276/files/renuparibimowud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2160/6818/files/58739257517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4828/8934/files/85931256764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7706/6140/files/ipl_2019_final_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3925/0853/files/you_only_live_twice_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/0144/7322/files/44792957936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/mufupopogalejemokeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9827/9841/files/fedex_international_waybill.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_off0000467f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x467F 5532 bytes
SHA-256: 89522a5d328587ccbe7aa4b760fabb253203fd40b5dd60c836bb71c402364bac
font_01_sfnt_off00005933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5933 9872 bytes
SHA-256: f4b741d7e18756c2d86695ce1a9a0142f1df82312bb8ebb548db772bc635a85d

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