Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ff39dbb23e1393…

MALICIOUS

PDF

42.5 KB Created: 2020-08-01 07:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed7fd408fd8c3306b6895bc6138e726d SHA-1: 71da67d1086f0da8569a761fa14fffbd692d2cee SHA-256: f9ff39dbb23e1393ea62286460ab0faef2dcf77d5a904814202dbacded8561b0
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector at 'https://ttraff.ru/pify?keyword=craftsman+dyt+4000+manual+pdf'. The document body, though partially corrupted, contains text related to 'Craftsman dyt 4000 manual pdf', suggesting a lure to disguise malicious activity. The presence of a link farm and the ML classifier's high confidence further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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://ttraff.ru/pify?keyword=craftsman+dyt+4000+manual+pdf
    • http://files.academyoffootballaustralia.com/uploads/1/3/1/3/131398555/lawur.pdf
    • http://files.trianglemarketplace.org/uploads/1/3/0/7/130738912/lefoguguga_wugalegopokop_lipurapovuwupa_novumobexifez.pdf
    • http://files.jeidanielbiotech.com/uploads/1/3/0/7/130740323/97ea3e55117e.pdf
    • http://files.lion-self-storage.co.uk/uploads/1/3/1/4/131454221/305a45cb972e779.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4133/files/wogutene.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9186/files/xasupaxinuzowafag.pdf
    • https://cdn.shopify.com/s/files/1/0434/5187/5481/files/fuzasisipewonutob.pdf
    • https://cdn.shopify.com/s/files/1/0430/8048/2967/files/30016802359.pdf
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/jipurowoni.pdf
    • https://cdn.shopify.com/s/files/1/0436/9186/8310/files/85944428784.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wijabogose.pdf
    • https://cdn.shopify.com/s/files/1/0432/2413/7890/files/99317037584.pdf
    • https://cdn.shopify.com/s/files/1/0439/0669/5320/files/bixuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/linedisa.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/11209033103.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b09.bin
224b4afdc67c1f4e50f05e68a2cb9832b5703c427299d4330da52e98785b8146		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B09 5148 bytes
font_01_sfnt_off00006c70.bin
e39505399c8c7f3ae960e62ab5c60c77d8ebfc24eb837ef3bb7a9c8891533817		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C70 10136 bytes
font_02_sfnt_off00008eeb.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EEB 4324 bytes

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