Malicious PDF — malware analysis report

Static analysis result for SHA-256 04431eab748eb406…

MALICIOUS

PDF

58.1 KB Created: 2020-08-05 17:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cecbda7139cb69efaf6692e87d07fd55 SHA-1: 323fbd927a7ad031a90fe35f5758baf36e3ce4ea SHA-256: 04431eab748eb4064cc6c2ba56cb02ba20a2e216eb4be0be9d09cec743408dbb
234 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to redirector infrastructure like 'ttraff.com'. The document body, though heavily obfuscated, contains text related to learning Russian and a URL that appears to be the primary lure. The ML classifier and heuristics strongly indicate malicious intent, likely to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=apprendre+le+russe+facilement+pdf In PDF document text
    • http://files.finalfurlongracingstable.com/uploads/1/3/1/4/131452880/duxemejusije.pdfIn PDF document text
    • http://zusod.lovingheartvegan.com/uploads/1/3/1/0/131070356/xijaven.pdfIn PDF document text
    • http://files.sopoligalake.com/uploads/1/3/0/7/130739590/zosemo-bawoxa-vezufexa.pdfIn PDF document text
    • http://files.eastcoastspeedwaytv.com/uploads/1/3/2/7/132741555/1895418.pdfIn PDF document text
    • http://files.crossroadsbiblecollegeandseminary.com/uploads/1/3/2/7/132710694/nubekeke.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/1/0430/5240/0793/files/31693428809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2127/9138/files/50567883553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6406/6209/files/65081422386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9222/0840/files/fuvixuvatepopipej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3481/files/peminisixosadodesizomijow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4363/3822/files/nekoniwavexiworezemekoli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3391/8616/files/35095214854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6776/8981/files/cs_go_config.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6591/5032/files/terraria_not_launching.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8222 5288 bytes
SHA-256: ee1a9cbd227673fdccc194dfeaebb7e5fe4196489446a9c7b8f670764e974d53
font_01_sfnt_off000093fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93FE 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00009c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C8C 12112 bytes
SHA-256: 85b1a787e2882793c847429894645375c1c3ca0d6c0fcac935d46d41bc8dc1de
font_03_sfnt_off0000c319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC319 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0