Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb2b3a3a6173aab…

MALICIOUS

PDF

44.9 KB Created: 2020-08-15 00:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0b4ecc0d05846ce09f89a03048a4408 SHA-1: db803961e98c5f11d44d43861550b4e74ae093ca SHA-256: deb2b3a3a6173aab837e1088bacc735bc2b0c4e0949b2c77d69be0b1b7bed112
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body and embedded links suggest a lure for downloading a PDF, likely to trick users into visiting the malicious URL. The presence of multiple Shopify URLs, some marked as benign, indicates an attempt to blend malicious links with seemingly legitimate ones.

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/wb?keyword=second%20chance%20robert%20kiyosaki%20pdf%20download
    • http://files.sig10-cleaning-decontamination.net/uploads/1/3/1/6/131606092/xebonitibivawo_kubaxefupat.pdf
    • http://files.comforttrainer.net/uploads/1/3/2/6/132681002/4312007.pdf
    • https://cdn.shopify.com/s/files/1/0434/7278/1477/files/functional_hypertrophy_training_program.pdf
    • https://cdn.shopify.com/s/files/1/0438/1641/9488/files/dorolufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/tomikinax.pdf
    • https://cdn.shopify.com/s/files/1/0437/3898/8709/files/ladun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9455/7347/files/briket_arang.pdf
    • https://cdn.shopify.com/s/files/1/0447/4827/5863/files/69926436528.pdf
    • https://cdn.shopify.com/s/files/1/0441/2122/7416/files/wugut.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/89826106888.pdf
    • https://cdn.shopify.com/s/files/1/0434/8136/6693/files/23356594558.pdf
    • https://cdn.shopify.com/s/files/1/0431/9769/4114/files/itil_change_management_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5400/files/roxaribituzivejesosemedo.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_off00006d67.bin
5bccf227df3071d56734def808afd498b7161c6ac71b08804e2a520a96f10cb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D67 5744 bytes
font_01_sfnt_off000080f1.bin
d8683a0da3639fca50de2d8fdef71fd95ba351c78d43062db85c2193387f3f4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F1 11272 bytes

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