Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1577f30c3572dbb…

MALICIOUS

PDF

40.8 KB Created: 2020-08-18 15:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8570969ef8d83d17e9c86d7fe56dc937 SHA-1: 978a37aaee00ac267b5164cf8be79c976f2eb1ec SHA-256: a1577f30c3572dbbe578d450339bbf4501bcfd4714800f154afa1ce824842e70
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents. One of these URLs, 'https://ttraff.ru/pify?keyword=helplessly+song++mp4', is flagged as a known malicious redirector. The document body contains garbled text and a repeated URL, suggesting it's not intended for human consumption but rather for automated processing or SEO manipulation. The presence of a malicious redirector indicates a potential phishing or malware distribution vector.

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=helplessly+song++mp4
    • http://files.equipasia.net/uploads/1/3/1/4/131437246/romapubo.pdf
    • http://files.beyondthedeskleadership.com/uploads/1/3/0/7/130738892/dizip.pdf
    • http://vumis.hopefulbyhope.ca/uploads/1/3/0/8/130874493/c32b6124.pdf
    • https://cdn.shopify.com/s/files/1/0435/7423/1199/files/98231737784.pdf
    • https://cdn.shopify.com/s/files/1/0446/5026/6787/files/cuore_nero_amabile_giusti_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/pavagusarugepuzavezuk.pdf
    • http://files.herb-and-dew.square.site/uploads/1/3/1/8/131871597/5075157.pdf
    • https://cdn.shopify.com/s/files/1/0431/3645/0714/files/mozetijefirope.pdf
    • https://cdn.shopify.com/s/files/1/0439/3399/1080/files/engineering_mechanics_dynamics_bedford.pdf
    • https://cdn.shopify.com/s/files/1/0438/3732/5462/files/kidusoraso.pdf
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/free_trade_advantages_and_disadvantages.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/ruxejejuwigunuzole.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/android_canvas_draw_transparent_rect.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_off000044f5.bin
35c7ef982be64d1da596d879fd1cfadf0da2a2fc0bc2ea4bb4f7d35758b81244		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44F5 4984 bytes
font_01_sfnt_off000055ed.bin
df92f6922594d5f9941cb703524743d5ae7f8ac0496d7663300bcd0e8a21d501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55ED 10032 bytes
font_02_sfnt_off000078aa.bin
f8d7792c56d96ebd2653109ff8e19cdffbc93f0fe30b9747a43bf7da0f74f01c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78AA 18948 bytes

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