Malicious PDF — malware analysis report

Static analysis result for SHA-256 b682dbf032815f3d…

MALICIOUS

PDF

45.5 KB Created: 2020-08-15 00:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a20595670f7f85d66d78248d72cc266c SHA-1: 04588b934379df7757cb8c8270057e94d3800cc0 SHA-256: b682dbf032815f3d0b28a8a5b31140f9d3f8ac96dfa5a87608e7f4e947b1ad6f
150 Risk Score

Malware Insights

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

The PDF document was flagged as malicious due to a high number of embedded links, many of which point to a redirector service. The document body contains text related to 'accumulating positive experiences worksheet' and the primary malicious URL is https://ttraff.cc/pify?keyword=accumulating+positive+experiences+worksheet. The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=accumulating+positive+experiences+worksheet
    • http://xudupuri.iammonicaparker.com/uploads/1/3/2/3/132302942/serinepor-zomonokovosagop-fimenimaj.pdf
    • http://pafufiwez.chrissyneelon.com/uploads/1/3/0/8/130814328/3863850.pdf
    • http://files.eds.company/uploads/1/3/1/4/131453248/fajus_lepes.pdf
    • https://cdn.shopify.com/s/files/1/0432/7938/4736/files/jizukoxi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9265/4745/files/miwumivupi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1532/3291/files/wumadafubul.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/assistance_dentaire_formation_montreal.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/55509239948.pdf
    • https://cdn.shopify.com/s/files/1/0430/8634/8450/files/fikodutup.pdf
    • https://cdn.shopify.com/s/files/1/0427/8566/9279/files/jesekokokuniwobaripigeji.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3825/files/70810598009.pdf
    • https://cdn.shopify.com/s/files/1/0433/8437/3406/files/keguborejukoveramiviw.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/95025633991.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_off00007380.bin
9c2575b2fcc586d1a47ecf260fcb9544a2b16cc4c1ccf4aab15c7f33aca941f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7380 5620 bytes
font_01_sfnt_off00008687.bin
31f1971d35d144d36d34a20bc97f1994c6116210e46891a11696918084357419		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8687 10088 bytes

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