Malicious PDF — malware analysis report

Static analysis result for SHA-256 c168fc85440fef1c…

MALICIOUS

PDF

41.9 KB Created: 2020-08-03 11:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5e7c3b02e4978774e4cd68285d0727eb SHA-1: 217e5ad8561f67b6b1e7900dbaefa4b399a0597b SHA-256: c168fc85440fef1c33a6d29e8d0f5fa9652490a58016cc8d2dfc17021d7307de
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including Shopify. 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 URL that triggered the redirector heuristic, suggesting a lure to academic content to mask malicious activity. The presence of numerous external 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=anthropology+optional+syllabus+upsc+pdf In PDF document text
    • http://files.art-camp.org/uploads/1/3/1/4/131406448/rurokidoderakaw-zezujaziba.pdfIn PDF document text
    • http://files.diamonddoula.com/uploads/1/3/0/8/130814714/2c2c78.pdfIn PDF document text
    • http://files.joanavillaverde.com/uploads/1/3/1/1/131163832/pevedom.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/1/0437/8319/2727/files/79493524705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3626/2052/files/aws_kms_decrypt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/piduvimivafiwawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7998/2492/files/1760157961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/0412/0475/files/digital_design_morris_mano_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/kodixotosinabox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7179/0486/files/77582447753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/74807336578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/vebusonepadibiniduw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2566/0066/files/pabudivexogepijowixoni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8071/8238/files/dns_server_unavailable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5331/8298/files/fupuxirorurixobefiweje.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_off000064aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AA 5648 bytes
SHA-256: 6992230f91fbc1933715b5d19d1b02de8ce0881cd2b0249e64d0b7f4e206879c
font_01_sfnt_off000077df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DF 10144 bytes
SHA-256: b4bc27defa4b4d72070fdbcdd6dd1c584de0a37b36aaa95b90be0c752d9fa092

Open this report in the interactive analyzer, or submit your own file for analysis.