Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb8d85009af08b6…

MALICIOUS

PDF

60.9 KB Created: 2020-12-21 08:22:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 80ad69867d65f145e44201532f71e77d SHA-1: c1c05b7665e8bbd39bea2c14ae88df6ac0c5065d SHA-256: 1fb8d85009af08b67d5f23cc61e8c9436a6dbfcb46987a49634a1ac35d24f21f
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating it's a malicious redirector and part of an SEO link farm, designed to trick users into clicking links. The primary redirector URL is `https://gettraff.ru/123?utm_term=mario+party+5+gamecube+iso`, which is associated with phishing lures. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=mario+party+5+gamecube+iso In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f88ab5e52750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369146/normal_5f88d87e14d7f.pdfIn PDF document text
    • https://fesoviso.weebly.com/uploads/1/3/4/7/134710514/rumosoruj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482618/normal_5fc0d63922a55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485818/normal_5fda61c658c08.pdfIn PDF document text
    • https://resodarapasak.weebly.com/uploads/1/3/4/6/134659305/lizemopezizoviw-vosato-woduvijivovobu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445338/normal_5fa917019f436.pdfIn PDF document text
    • https://fobepomakiroka.weebly.com/uploads/1/3/0/8/130874330/11dfaf9c1fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446168/normal_5fdb6909863ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485010/normal_5fb4dc3203d14.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/5717a5621b69.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/92a989a8-493a-4284-b548-418e9a8ea382/33091399552.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/2017_buick_encore_radio_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aec80c1-6ce6-4306-a8fe-3ead6119a1ad/duxij.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 8

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_off0000b00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB00E 5592 bytes
SHA-256: c4821e975cc4142173196eed4348045fbae63ef0f0fd8f0d32a7fc5840108042
font_01_sfnt_off0000c31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC31A 10628 bytes
SHA-256: 51cc2f88edcd01bba6aa741230d6c94d385f1e9c66003947632372291cb3b6a3

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