Malicious PDF — malware analysis report

Static analysis result for SHA-256 c24b81f711a181f3…

MALICIOUS

PDF

41.3 KB Created: 2020-08-13 00:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c107e83723834d2f02d8934bb0ca830f SHA-1: ca2458a71e3b9fc6e3554c4e6d26737c72245e04 SHA-256: c24b81f711a181f37150e9756eaa6a9393038645c503113867eef88ae46086db
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a link farm or SEO poisoning technique used to disguise malicious intent. The document body, though heavily obfuscated, contains the same URL, reinforcing the lure. The primary goal appears to be redirecting the user to malicious infrastructure.

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.ru/pify?keyword=bsc+nursing+merit+list+2020+pdf In PDF document text
    • http://files.topsthemonkey.com/uploads/1/3/2/6/132695575/popexabesip_joripuloren_nekafuzavisope_wirepileneraki.pdfIn PDF document text
    • http://files.afterschoolamerica.org/uploads/1/3/0/7/130776130/077d58.pdfIn PDF document text
    • http://files.cmurillo.com/uploads/1/3/2/7/132740329/97b2d1590d8.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/1/0437/4459/2021/files/lifolatozabipobegawam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1379/9066/files/rebebususetijati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5912/5160/files/95797193991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26450106566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4374/9029/files/z390_aorus_pro_wifi_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2597/2904/files/badavawiluxafetaliz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8736/2216/files/delolugumalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8999/3635/files/accidentals_in_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/turepawoxowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/69921096223.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 2

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_off000062e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E2 5588 bytes
SHA-256: 9ced94d71b224e2d648410b331f2c2d69730233311a8b1045c155fb2d19cce6e
font_01_sfnt_off000075ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75CE 10180 bytes
SHA-256: 27c1f101dc6c8a444765918956dd7a16879da237d6b9dab9f2d6f5356f186986

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