Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a8b316586606633…

MALICIOUS

PDF

44.9 KB Created: 2020-07-29 15:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 917af01454700955095ff4129fc6b6e5 SHA-1: aedea2b9a8c9ca619d087474b1415251f317ba9b SHA-256: 3a8b3165866066338c18464697c6599dbf6434f1fd28617204b0c3b4a871f7b8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded URLs, with one identified as a known malicious redirector. The document body, though heavily obfuscated, appears to contain keywords related to 'abuse' and 'definition', suggesting a lure. The presence of a link farm heuristic further indicates an attempt to drive traffic to external sites, likely for malicious purposes such as phishing or malware distribution.

Heuristics 3

  • 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.
  • 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://ttraff.ru/pify?keyword=definition+of+abuse+pdf
    • http://files.jaspreetsran.com/uploads/1/3/1/8/131856271/zekitukerafir.pdf
    • http://files.farmdalehawks.org/uploads/1/3/1/4/131482939/7963391.pdf
    • http://files.shakespeareonclark.com/uploads/1/3/1/3/131379650/tonetagididizi.pdf
    • https://cdn.shopify.c
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/86773022156.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/kiwufopibazuveto.pdf
    • https://cdn.shopify.com/s/files/1/0435/4415/0165/files/famofiwig.pdf
    • https://cdn.shopify.com/s/files/1/0436/3039/5552/files/piviwuvireperusaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4687/files/83864216230.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/fabokabewarelifisavo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6707/9830/files/darux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fokadexowigexavutezirero.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/lavepisolona.pdf
    • https://cdn.shopify.com/s/files/1/0439/4817/9611/files/dupikabum.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_off0000723d.bin
aef162f2eca8668ae7e9d99c183fa059de23c72d0efc63fc20ccb88765709d6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x723D 4928 bytes
font_01_sfnt_off00008309.bin
4e8d58000297ec50a528fac70b03c5058bdd35fa2356d1ed9ed9f6b6be3c5abb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8309 10444 bytes

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