Malicious PDF — malware analysis report

Static analysis result for SHA-256 62affff069fc7db1…

MALICIOUS

PDF

75.1 KB Created: 2021-01-17 02:57:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 53be1da634e2b441224428ffd853149b SHA-1: ef2532c9e94963a7f475051156171eeb2cb687a5 SHA-256: 62affff069fc7db1017a8aeca6eba173f42c799b202397b5dd67bcb7d5e5cfff
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous external URIs, with one pointing to 'trafffi.ru', suggesting a phishing or malware distribution attempt. The PDF's structure and embedded links indicate it functions as a link farm, designed to redirect users to potentially malicious websites.

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
  • 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.
  • 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://trafffi.ru/123?utm_term=tamarindo+drink+ingredients PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427809/normal_5fe6d09e80bff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374957/normal_5fb6ef0776458.pdfIn PDF document text
    • https://site-1175189.mozfiles.com/files/1175189/tigujajekimabe.pdfIn PDF document text
    • https://site-1168177.mozfiles.com/files/1168177/todd_rundgren_hello_it_s_me_wiki.pdfIn PDF document text
    • https://nidobafimenute.weebly.com/uploads/1/3/4/5/134526671/gilajepowija.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454303/normal_5ff89ce0b06f1.pdfIn PDF document text
    • https://site-1168194.mozfiles.com/files/1168194/kuvodowezuwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464067/normal_5fa39a6baff38.pdfIn PDF document text
    • https://site-1166620.mozfiles.com/files/1166620/kendall_kylie_shoes_uk.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
    • https://s3.amazonaws.com/jedobufudajewu/joomla_forum_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/zidodoxelifuxu.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_off0000db0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0A 4912 bytes
SHA-256: dec5faee0f47879195be2604ac117caa885925a3ec5241b69a6a7f0dac710132
font_01_sfnt_off0000eba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA4 11388 bytes
SHA-256: 402003a52ecabb4952e8537ceed9394e41dc5737f3540cc06d53f46dad1c0042
font_02_sfnt_off00011230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11230 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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