Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f8689a31e086dc…

MALICIOUS

PDF

51.6 KB Created: 2020-08-10 01:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c372dfb6cf72a5549ffca4982ef1e785 SHA-1: 7447a45fe4744b6ba53eab5549b31e3193e9ca14 SHA-256: 74f8689a31e086dcb6fd028555e95c9f3035bec38bcc35d3a67914c79fb2aa69
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is designed to trick users into clicking on malicious links. It contains a large number of embedded URLs, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body itself contains obfuscated text and URLs, suggesting an attempt to disguise its malicious intent. The ML classifier strongly flagged this PDF as malicious, reinforcing the findings from the heuristic rules.

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=adaptive+immunity+pdf In PDF document text
    • http://binamofuv.engageinspireexpectinform.com/uploads/1/3/1/3/131381679/fedanidumewo.pdfIn PDF document text
    • http://files.corpuschristiquilters.com/uploads/1/3/2/6/132682040/naravagamuwo.pdfIn PDF document text
    • http://files.muusan.org/uploads/1/3/1/1/131163667/ee82b3ff.pdfIn PDF document text
    • http://files.stephvenerus.com/uploads/1/3/1/8/131872054/tutuxejadu_mobokimolofu_bowosonesivu.pdfIn PDF document text
    • http://files.luvtheview.com/uploads/1/3/1/4/131406861/rugobena.pdfIn 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/1/0432/5575/9011/files/total_gym_workout_routine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1165/3277/files/writing_argumentative_essays_nancy_wood.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6587/6378/files/articulation_and_phonological_disorders_bernthal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8400/5032/files/novut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0877/6599/files/16022346491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/95824059900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5725/8402/files/mapudosogug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/redepunonesomon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/45268040802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/amisom_mandate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3042/6278/files/sap_basis_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/alliance_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2624/9885/files/4700536113.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE9 4804 bytes
SHA-256: 8024b1173d5ad1d6c5d6d5d624a202e438725689cafcc57805482d0b5dbee747
font_01_sfnt_off0000903c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x903C 10228 bytes
SHA-256: eb45fc54b76e771e98e95f1cdefb02e3d8262bf5ef4c47640491d028e1473475
font_02_sfnt_off0000b325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB325 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e