Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1058d6973f1ad3…

MALICIOUS

PDF

39.8 KB Created: 2020-09-28 16:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 91e294671347e6392cd0abe4848b8fdc SHA-1: d9ec2811405925eee69fcd0e7f6b7af38f220d5e SHA-256: fe1058d6973f1ad32777fc3a45d973ee59fd4e04567e5789f76396d17448300a
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to a link farm designed for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ggtraff.ru', which is used to obscure the final destination. The document body, though malformed, contains text related to 'synonyms dictionary pdf free download' and the malicious URLs, suggesting a lure to trick users into downloading potentially harmful content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/mozel?keyword=synonyms+dictionary+pdf+free+download In PDF document text
    • http://pexisis.behindthebittack.com/uploads/1/3/1/3/131380177/fogajoxunudo.pdfIn PDF document text
    • http://files.lucycoker.com/uploads/1/3/1/4/131453543/2382852.pdfIn PDF document text
    • http://tetaguwo.namasteesperanza.com/uploads/1/3/0/9/130969259/fexajigefe_jogerowu_regur.pdfIn PDF document text
    • http://files.tormonbrothers.com/uploads/1/3/1/6/131637553/2091991.pdfIn PDF document text
    • http://files.mightydisplay.com/uploads/1/3/0/7/130740323/3974402.pdfIn PDF document text
    • http://lifevaxer.dynamicathleticcenter.org/uploads/1/3/2/7/132741066/mebiw.pdfIn PDF document text
    • http://files.biljohnson.com/uploads/1/3/0/7/130775520/bosuvefupamewunan.pdfIn PDF document text
    • http://lonaduji.trainingspaceokemos.com/uploads/1/3/2/6/132682883/54be279f1ad3.pdfIn PDF document text
    • http://files.hammanrealestate.net/uploads/1/3/1/4/131453451/memere_zujerawilap.pdfIn PDF document text
    • http://pesibe.precisioncamerarepairs.com/uploads/1/3/1/4/131453943/nuxozasovi.pdfIn PDF document text
    • https://site-1037057.mozfiles.com/files/1037057/46853750356.pdfIn PDF document text
    • https://site-1036832.mozfiles.com/files/1036832/23093636794.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00005b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B11 5596 bytes
SHA-256: ac573db53b2df44f71e9da1381e097345dd0cff77a5f5de21911d0df25f214ea
font_01_sfnt_off00006e22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E22 10736 bytes
SHA-256: 06126cf39a7a8376f7bb260641e1b9343d77da014fda992ba3bf34081e1cf501