Malicious PDF — malware analysis report

Static analysis result for SHA-256 5138969b59331150…

MALICIOUS

PDF

40.5 KB Created: 2020-08-28 11:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4fb12626fd49cb903e6cf4fc558039f6 SHA-1: 5c97ecf8ee8ccb367f2774532e52818be18f9407 SHA-256: 5138969b59331150d8852dfd7bcb3c6fbfdf92cc4415c84ce99e4a7ace94904f
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, forming a link farm. One critical heuristic flagged a link to a known malicious redirector service (ttraff.cc), suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the same redirector URL and numerous other URLs hosted on cdn.shopify.com and other domains, likely part of the link farm.

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=a+hist%25C3%25B3ria+cultural+entre+pr%25C3%25A1ticas+e+representa%25C3%25A7%25C3%25B5es+chartier In PDF document text
    • http://mukon.hiscb.org/uploads/1/3/2/6/132682787/5786600.pdfIn PDF document text
    • http://files.jogscotland-aberdeen.org/uploads/1/3/1/6/131606092/c434d6.pdfIn PDF document text
    • http://files.hand-e.org/uploads/1/3/0/7/130775623/9786161.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/1/0432/9167/2736/files/tirevowokisirevajumabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/5634/4737/files/bangladesh_accounting_standard_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0678/6725/files/91789601298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/zerozobusemapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87294954422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5181/7883/files/papa_americano_original_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9619/2664/files/badminton_historia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20011772627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/jarebasukevo.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
    • https://doi.org/10.11606/issn.2316-9141.v0i121p149-154In 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 3

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_off00005bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD3 5780 bytes
SHA-256: 6cd2cea6efc10782b8dfc74a04585bae5478b670d16a29088260e1b898fa6b6c
font_01_sfnt_off00006e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E05 11908 bytes
SHA-256: e334a6f989a55878cd1100b6ea661d76f7d7368837d8aa6dc545e1529b14e912

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