Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc952be905f0ca6…

MALICIOUS

PDF

46.8 KB Created: 2020-08-19 07:33:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5cf7fd504f6cecaa41f1172762b22d2 SHA-1: 3d878e56d095b71bf985e17a49f311035ef9f6d9 SHA-256: 3dc952be905f0ca69ec8398802a0f08c7c260c1d41afb3190b66917d2334a879
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external links, indicative of an SEO spam or phishing campaign. The primary malicious URL identified is https://ttraff.ru/pify?keyword=btob+beautiful+pain. The document body contains garbled text but also includes the same malicious URL and several Shopify-hosted PDF links, reinforcing the link farm and redirector findings.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=btob+beautiful+pain
    • http://files.stevewanna.com/uploads/1/3/2/6/132695546/c5fa45cb.pdf
    • http://files.hartauditorium.org/uploads/1/3/1/3/131382470/6401688.pdf
    • http://files.goodbless.us/uploads/1/3/1/4/131438471/a775c0ea78ddc57.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24501063531.pdf
    • https://cdn.shopify.com/s/files/1/0433/4937/7177/files/77862302020.pdf
    • https://cdn.shopify.com/s/files/1/0435/0718/7872/files/5th_grade_math_problems_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0451/7625/8711/files/types_of_dialysis_machines.pdf
    • https://cdn.shopify.com/s/files/1/0436/6719/4021/files/woridaselexuxijojavokabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6558/1468/files/cat_iii_movie.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/ximadanu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1513/3605/files/54773617161.pdf
    • https://cdn.shopify.com/s/files/1/0450/8496/7077/files/30360910474.pdf
    • https://cdn.shopify.com/s/files/1/0437/4672/1946/files/gagokusimagisu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56751463133.pdf
    • https://cdn.shopify.com/s/files/1/0436/2777/4115/files/watermark_remover_from_video_apk.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005abd.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABD 2828 bytes
font_01_sfnt_off000064b7.bin
b1a0b2b06b936cef91a4161ec8a066357784a2a12f3e7c8b94ea05266474692f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B7 4808 bytes
font_02_sfnt_off00007526.bin
4007e7fd640883fde4ed39490f1efaa800516dc5334e8d6c11eeb23de9b4b4dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7526 9956 bytes
font_03_sfnt_off0000975c.bin
cee4b49cb3723fed048e16b22eb70908f5e8655cfdf2eec173b09e45246aada9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x975C 16120 bytes

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