Malicious PDF — malware analysis report

Static analysis result for SHA-256 770395ada82f2820…

MALICIOUS

PDF

42.5 KB Created: 2020-08-25 00:10:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a55a31343a189541b936839940fd4c09 SHA-1: da55194afc7ddaafe935039747dc010e6a0a2d69 SHA-256: 770395ada82f2820b50e0f23fee90f081ebcb7e667183764433de144643b9d93
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (https://ttraff.ru/pify?keyword=equation+of+a+line+worksheet+pdf), suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains a reference to the same redirector URL, reinforcing the malicious intent. The presence of multiple embedded links and the ML classifier's high confidence indicate a deliberate attempt to direct users 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=equation+of+a+line+worksheet+pdf In PDF document text
    • http://rikekipep.trinityclaremont.org/uploads/1/3/1/3/131384403/kukuxuninazapo-jujufo-vabubeserol.pdfIn PDF document text
    • http://files.rg4ed.com/uploads/1/3/1/4/131436967/zotiwe_xolikek_wolidamu_rufob.pdfIn PDF document text
    • http://bituxose.qbmusichub.com/uploads/1/3/1/4/131483453/afd652084.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0428/6405/0332/files/big_5_personality_test_interpretation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4169/2580/files/dupokuleworuti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6797/3538/files/29888316705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/zigiluzake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7003/7911/files/gotezujozezovejugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/xajelejumunavotavule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7872/9374/files/kodoforanaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/ladawutedujixatuwunuxe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CEA 1820 bytes
SHA-256: e2f3f40f4f26c10b7744f22f701439f4f3dfe912cf818f1e834db921614360f8
font_01_sfnt_off00006572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6572 5368 bytes
SHA-256: 04063615907f4c75454a482e1c8604f68c9bec77c905c103f5a65b1abf5af453
font_02_sfnt_off000077c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C3 10972 bytes
SHA-256: d4e0c977ece98de1b96adda905e99816ca0fee0d8651b917ff49cf7f73fddc58

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