Malicious PDF — malware analysis report

Static analysis result for SHA-256 41b1c1a55ed3ac21…

MALICIOUS

PDF

50.6 KB Created: 2020-12-15 19:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 88aa890a7521516c8392f828c0574d8c SHA-1: 9d791373b01a74851edfe9967f917afb08e6cbe8 SHA-256: 41b1c1a55ed3ac219f58a2a59fec3b4027dd5d64f8cfbf043d53dd436c782f3d
252 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links designed to appear as a tablet manual, but analysis reveals they lead to a redirector URL, likely for phishing or malware distribution. The presence of a link farm and redirector infrastructure strongly suggests a malicious intent to lure users to malicious content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8247

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 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.
  • 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://traffmen.ru/aws?utm_term=alcatel+one+touch+pixi+tablet+manual In PDF document text
    • https://s3.amazonaws.com/kukazowox/44230057979.pdfIn PDF document text
    • https://ruvetuse.weebly.com/uploads/1/3/4/6/134618438/ziwofizafadezeloxixa.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/93565026080.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/bekuluripojetejofebebu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451932/normal_5fc7677febfac.pdfIn PDF document text
    • https://s3.amazonaws.com/xebareto/52221560403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484805/normal_5fbeec2f7b9fe.pdfIn PDF document text
    • https://mabufome.weebly.com/uploads/1/3/4/8/134880487/wivizusu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454678/normal_5fc3edb91cd1f.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c1778c9-89e0-4267-b1fe-44d0f63b6226/vigofobiwetutisejurabupo.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB942 3724 bytes
SHA-256: 59701ab6f1a8c012dd8ec870d317e4651c2abf9fe53e1fa5cdcb5946a55c7908