Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e3b31b554001312…

MALICIOUS

PDF

98.7 KB Created: 2021-01-16 18:05:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: f6e50857c20599c1fd81e78882fc7277 SHA-1: 49599f34f84ad31c3725a2c7d37e88adaa112986 SHA-256: 3e3b31b55400131219a93e83aa8240edb03aa5486f43fa2328f2c13efaa218ba
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is 'https://trafffe.ru/123?utm_term=old+frederick+county+middle+school+winchester+va', and another suspicious link points to 'https://turetufifej.weebly.com/uploads/1/3/4/5/134500159/kareniwivejoxone.pdf'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/123?utm_term=old+frederick+county+middle+school+winchester+va PDF link annotation
    • https://turetufifej.weebly.com/uploads/1/3/4/5/134500159/kareniwivejoxone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417321/normal_60000d4e34db2.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxezitowefi/iiMHNgc/download_pixel_car_racer_mod_pc.pdfIn PDF document text
    • https://jujepuwajepoxox.weebly.com/uploads/1/3/4/4/134466337/lizadetejabuvad-jesowamono-magudetinuse.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jotizifime/chiari_malformation_symptoms_child.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/93502567960.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/sukadarumerarofanawak.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/nintendo_gamecube_instruction_manual_free.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/dufisupireviwix.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/xesezimekuv.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/chronic_bachelor_songs_maango.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/16377230473.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001446b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1446B 5604 bytes
SHA-256: b7a94fb7ff403adfbb9b0490911297e062ba081aacd3a9b9577be806e1e635e2
font_01_sfnt_off00015771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15771 11752 bytes
SHA-256: 7902d14a1cc0f3137befe19f6323512942abb73815d3206beba71a8b9453b53d

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