Malicious PDF — malware analysis report

Static analysis result for SHA-256 9330e5b429d38f16…

MALICIOUS

PDF

78.5 KB Created: 2021-01-17 11:01:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 77be5f381457c28ec85759ca959faeaa SHA-1: 72d98c7a9097ba09534d36e405241e2d9be97277 SHA-256: 9330e5b429d38f166430e1217cbc218b61a55669294bcd978556efc32c69fa65
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF identified as malicious by ClamAV and an ML classifier. It contains embedded links, one of which, 'https://traffine.ru/aws?utm_term=certificate+of+origin+form+b+china', is flagged as a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Certificate of origin form b china', likely intended to trick users into clicking the malicious link. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/aws?utm_term=certificate+of+origin+form+b+china In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450907/normal_5fb7493c42cb1.pdfIn PDF document text
    • https://vewosofi.weebly.com/uploads/1/3/4/4/134493368/2712524.pdfIn PDF document text
    • https://cdn.sqhk.co/birugafomafo/9v2Dahh/zabazuro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414353/normal_5ffa429fba846.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366047/normal_5fe0aa5a1277d.pdfIn PDF document text
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/narofapasuzewi.pdfIn PDF document text
    • https://javisifuwo.weebly.com/uploads/1/3/5/3/135304639/maxunok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467561/normal_5fd968acd004d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5f8acde7d49ef.pdfIn PDF document text
    • https://cdn.sqhk.co/kagumuzom/cZFMiaJ/13833753231.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
    • http://fitimulosegi.epizy.com/88079919895.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/density_questions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/74326320306.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/obligated_to_answer_door.pdfIn PDF document text
    • http://sabukizazuse.epizy.com/t_s_full_form_state.pdfIn PDF document text
    • http://safefimij.epizy.com/94726008424.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_off0000e893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE893 5036 bytes
SHA-256: 459a2a4ad3c29424aa4022128d02da564a172e51576604f3edbb6a8b4c2a954b
font_01_sfnt_off0000f984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF984 10964 bytes
SHA-256: 23fcdaf7a3f1ae4fa8fb6f5dfc38e09fe0bbc99a110cf6919641ed586a980c2e
font_02_sfnt_off00011ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE5 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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