Malicious PDF — malware analysis report

Static analysis result for SHA-256 24a28d54cd7b8624…

MALICIOUS

PDF

56.8 KB Created: 2020-08-26 19:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 466d3f1acf89e227e3cee84f58fcc500 SHA-1: 0a4c478ed2c8cb00100ae7ea3902ffc9a6d0ed95 SHA-256: 24a28d54cd7b86248c01a478de9b3bd54ed2696e0b550958b3d1a0cc12ecac31
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body, though partially garbled, includes the text 'Authorised signatory list format' and the malicious URL, suggesting a lure. Additionally, a heuristic indicates a 'PDF SEO Link Farm' with numerous external PDF links, and another suggests a callback phishing lure, consistent with social engineering tactics to entice users to click malicious links.

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=authorised+signatory+list+format In PDF document text
    • http://jirupu.sgttommyskids.org/uploads/1/3/1/4/131454012/getudumunobumu-xojerotiganenu-jejiwam-doxujefozi.pdfIn PDF document text
    • http://files.winonarootriverpf.org/uploads/1/3/0/8/130813427/59556d.pdfIn PDF document text
    • http://files.herbalhealthandhealingarts.com/uploads/1/3/0/7/130776042/9519705.pdfIn PDF document text
    • http://///www.ftc.govIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3760/files/tunejexudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0720/3739/files/dexopemexododad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/27910723950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4684/4054/files/15155898954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/raputupebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1864/7709/files/60132177592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8783/9910/files/manafaxegekowodef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8087/4139/files/zeguzuxab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7749/1105/files/47392447445.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000916a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x916A 5292 bytes
SHA-256: 71f1301f101f88de2f1bc5fe578f8d3657341c34c5004cc4cdf631c58ea6570a
font_01_sfnt_off0000a349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA349 10868 bytes
SHA-256: 8f57dbf1745016f5777541c47d4dae09878acf846af51bcc4530deebb84b75f1
font_02_sfnt_off0000c863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC863 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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