Malicious PDF — malware analysis report

Static analysis result for SHA-256 97cc41de6e520084…

MALICIOUS

PDF

75.8 KB Created: 2021-01-16 11:43:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed6878fdf678c8088578e290fab63751 SHA-1: eb798af5cdb1f5aaf719df566aeea68651d20b76 SHA-256: 97cc41de6e52008448faab1e9cb8df7228e349aa6e3c7bebb0dfc207c236f6fd
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for a PDF link farm. The presence of numerous external links, one of which points to a suspicious domain ('trafffi.ru'), suggests an attempt to redirect users to malicious content. The ML classifier and ClamAV detection further support its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=party+racers+2020
    • https://fiwenozagor.weebly.com/uploads/1/3/4/3/134363395/mevuvifeweje.pdf
    • https://cdn.sqhk.co/gabazumad/Iijjcic/wexujutezon.pdf
    • https://site-1171473.mozfiles.com/files/1171473/83616121876.pdf
    • https://site-1181117.mozfiles.com/files/1181117/buvan.pdf
    • https://site-1178232.mozfiles.com/files/1178232/tamil_movie_2019_hd_movies.pdf
    • https://static.s123-cdn-static.com/uploads/4369936/normal_5fca3c7675ecd.pdf
    • https://site-1083673.mozfiles.com/files/1083673/xujakatezutizesal.pdf
    • https://cdn-cms.f-static.net/uploads/4403404/normal_5fb8d2d81ea01.pdf
    • https://cdn-cms.f-static.net/uploads/4477183/normal_5fe9df314cc87.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/juvuraguvutoxif/bavovavomubetopovu.pdf
    • https://s3.amazonaws.com/bevarolimesale/woxonotanawika.pdf
    • https://s3.amazonaws.com/banula/32540948317.pdf
    • https://s3.amazonaws.com/xoguwavosuje/kebizuparopoxewokemati.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec29.bin
306f0835332a97c507f02564acccd03c0671182195bd53e9d2d23f323c88d4d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC29 5136 bytes
font_01_sfnt_off0000fdb5.bin
6523e165f973048ffa5af1fddc45584def5baaa1a50f0e4c5a27995faf6c895b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB5 11036 bytes