Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e633c877688ffe1…

MALICIOUS

PDF

49.5 KB Created: 2020-08-06 09:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a44dd6ffd70e1165c355be260d484c4 SHA-1: 305d28e80e6ae2aa95b74c18da727d218a894c2f SHA-256: 4e633c877688ffe1c2373e3d1d1aec638b965e70f62d2ba99a7ec99d80f49fc7
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=list+of+all+important+days+in+pdf`. The document body, though heavily obfuscated, also contains this URL and numerous other PDF links, suggesting a link farm or redirection strategy. The primary intent appears to be directing the user to malicious infrastructure, likely for phishing or to download further malware.

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=list+of+all+important+days+in+pdf
    • http://nexate.lakeshoreregionponyclub.org/uploads/1/3/0/7/130775734/wosexifudopapeso.pdf
    • http://files.threerivertheatre.com.au/uploads/1/3/0/7/130740011/sonevijiwalu-nesidopovege.pdf
    • http://files.grand-beginnings.com/uploads/1/3/1/4/131437464/zuraf.pdf
    • http://files.siberianhuskyclubofgreatergreenville.com/uploads/1/3/1/3/131380128/womagame_dipawo.pdf
    • http://files.sarahiebert.com/uploads/1/3/0/7/130740465/3119299.pdf
    • https://cdn.shopify.com/s/files/1/0431/5774/9917/files/jolly_phonics_sound_chart.pdf
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/757_333_3411.pdf
    • https://cdn.shopify.com/s/files/1/0439/8107/8686/files/psychology_themes_and_variations.pdf
    • https://cdn.shopify.com/s/files/1/0435/8445/4817/files/75700335925.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/gender_considerations_and_entrepreneurship_development_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0436/9504/6824/files/taxetixudirirev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/56088832902.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/kunelira.pdf
    • https://cdn.shopify.com/s/files/1/0444/6171/9719/files/random_us_city.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/75465384885.pdf
    • https://cdn.shopify.com/s/files/1/0433/3853/0965/files/zinel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37638787324.pdf
    • https://cdn.shopify.com/s/files/1/0431/7993/3862/files/math_teacher_s_guide_grade_9.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_off000083d2.bin
f8ddfd77625e8a9d6d34429e66e7ccb9136d300242de08cd256f48fbe532afe7
pdf-font-stream PDF embedded font (sfnt) at offset 0x83D2 5228 bytes
font_01_sfnt_off00009592.bin
a7ce558ef3282a72efee43d12abad36464862daae94ca0653d4ada6555a597d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x9592 10264 bytes