Malicious PDF — malware analysis report

Static analysis result for SHA-256 55872069a569c709…

MALICIOUS

PDF

50.0 KB Created: 2020-08-02 05:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c8e2af5b38ccbe755ee7847acd2fd5ff SHA-1: 582a6e42240a3f27571ac919bc8d09bde3a028eb SHA-256: 55872069a569c709d69d7817e7b8214b940bfdfb75a3708a41c9efb110e061fb
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links pointing to other PDF files, indicative of a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.com/pify?keyword=rune+mysteries+osrs. The ML classifier strongly supports the malicious verdict. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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.com/pify?keyword=rune+mysteries+osrs In PDF document text
    • http://files.priorityathlete.com/uploads/1/3/0/7/130738799/8000719.pdfIn PDF document text
    • http://files.goldenbayatc.org/uploads/1/3/1/0/131070820/kamadi.pdfIn PDF document text
    • http://files.tssparking.com/uploads/1/3/1/3/131384401/kelilefi-fososegexes.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/1/0436/4356/8278/files/zamonofise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/sekanasopejona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76222514852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9908973296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6566/1845/files/desmos_quadratic_regression.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4003/8298/files/nobilisefuberemaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8951/7978/files/72278290140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2838/0839/files/7128910296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6114/8836/files/academia_4xx_af_fragments.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5559/5172/files/23394950229.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 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_off000088c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C8 4700 bytes
SHA-256: d686b012f4ac6a027b3de7f50b82cdba56e2bd9df0aef25339b944c25a06f248
font_01_sfnt_off000098b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98B7 10192 bytes
SHA-256: 60197489ad1e867ce5010ca97e4be33d1b18df0fbdbfbd46b0386a88499b4380

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