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)
MD5: 91e294671347e6392cd0abe4848b8fdc SHA-1: d9ec2811405925eee69fcd0e7f6b7af38f220d5e SHA-256: fe1058d6973f1ad32777fc3a45d973ee59fd4e04567e5789f76396d17448300a
128 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.

Heuristics 4

  • 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.
  • 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
  • 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
    • http://pexisis.behindthebittack.com/uploads/1/3/1/3/131380177/fogajoxunudo.pdf
    • http://files.lucycoker.com/uploads/1/3/1/4/131453543/2382852.pdf
    • http://tetaguwo.namasteesperanza.com/uploads/1/3/0/9/130969259/fexajigefe_jogerowu_regur.pdf
    • http://files.tormonbrothers.com/uploads/1/3/1/6/131637553/2091991.pdf
    • http://files.mightydisplay.com/uploads/1/3/0/7/130740323/3974402.pdf
    • http://lifevaxer.dynamicathleticcenter.org/uploads/1/3/2/7/132741066/mebiw.pdf
    • http://files.biljohnson.com/uploads/1/3/0/7/130775520/bosuvefupamewunan.pdf
    • http://lonaduji.trainingspaceokemos.com/uploads/1/3/2/6/132682883/54be279f1ad3.pdf
    • http://files.hammanrealestate.net/uploads/1/3/1/4/131453451/memere_zujerawilap.pdf
    • http://pesibe.precisioncamerarepairs.com/uploads/1/3/1/4/131453943/nuxozasovi.pdf
    • https://site-1037057.mozfiles.com/files/1037057/46853750356.pdf
    • https://site-1036832.mozfiles.com/files/1036832/23093636794.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b11.bin
ac573db53b2df44f71e9da1381e097345dd0cff77a5f5de21911d0df25f214ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B11 5596 bytes
font_01_sfnt_off00006e22.bin
06126cf39a7a8376f7bb260641e1b9343d77da014fda992ba3bf34081e1cf501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E22 10736 bytes

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