Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a1deab55ef8a733…

MALICIOUS

PDF

39.7 KB Created: 2020-08-16 19:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c255ae38897092fea6b54586e564eb67 SHA-1: cccbd3b4acf656dbe09914a18db9e4da73ac6b88 SHA-256: 8a1deab55ef8a7334f051993befd3a6754b0c36dbea86734d42ba7b33e07c6ea
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure related to 'Australian dental association infection control guidelines'. The presence of numerous PDF links suggests a link farm or SEO poisoning tactic to distribute malicious 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.cc/pify?keyword=australian+dental+association+infection+control+guidelines In PDF document text
    • http://taxij.parkcitybrewery.com/uploads/1/3/2/8/132814930/jutikoxukat_viretomesepex.pdfIn PDF document text
    • http://fegusun.scottyanco.com/uploads/1/3/0/7/130740596/xaludireko_rasefanoxixo.pdfIn PDF document text
    • http://wovab.juliergoddard.com/uploads/1/3/1/1/131164392/rumunapadifo.pdfIn PDF document text
    • http://paxive.spatiallaser.com/uploads/1/3/1/6/131606000/koginalifumadej_posix_jivegawamolopig.pdfIn PDF document text
    • http://files.inscience242.com/uploads/1/3/1/4/131406558/fijiv.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/1/0443/4237/8652/files/learning_styles_inventory_for_elementary_students.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/39466174317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6746/4093/files/hernia_de_hiato_alimentao.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3778/5240/files/vemokopigozerawiwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8276/3679/files/swing_trading_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7657/3601/files/kifapozixegumali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2316/1768/files/59304979327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/curso_de_economia_introduo_ao_direito_econmico_fabio_nusdeo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8678/2369/files/68031663596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1550/4029/files/gezopuninoz.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4F 5180 bytes
SHA-256: 27eb66891dfc3f431c5175cb6c040e8a7c772b877e5114dab7a71172ce5b5628
font_01_sfnt_off00006df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF9 10400 bytes
SHA-256: 401daea9c6608b66d290188f116f4d0d21a4cc280352da39cda69155f1689695

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