Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dd8362b47e14c78…

MALICIOUS

PDF

42.0 KB Created: 2020-08-12 08:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66054e68fc2f6fcc35195cde3cd3178b SHA-1: 91c38784a15c2084d797c9f9be2e23b0bf9f9d22 SHA-256: 4dd8362b47e14c782c7f4caf7be50f5daac4d1e7a7504b8f26212c4e220ef8c9
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, masquerading as a D&D spell reference. One of these links, 'https://ttraff.ru/pify?keyword=d+d+5e+bard+spells+pdf', points to a known malicious redirector. The document body is heavily obfuscated but contains references to the lure and the malicious URL. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malware through compromised sites.

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=d+d+5e+bard+spells+pdf
    • http://pibijaw.christopherkrieg.com/uploads/1/3/1/3/131398368/remunigediforadof.pdf
    • http://files.alexstudio.bg/uploads/1/3/1/1/131164448/875fbb5e4c12d5.pdf
    • http://files.barbarafoxart.com/uploads/1/3/1/4/131482941/jerexomudixipexupo.pdf
    • http://tuwuzek.joshuaduncanartist.com/uploads/1/3/2/6/132681579/gomefare.pdf
    • https://cdn.shopify.com/s/files/1/0429/5353/9747/files/lowunujo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/lotopolifuf.pdf
    • https://cdn.shopify.com/s/files/1/0447/9637/9297/files/understanding_and_using_english_grammar_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/medade.pdf
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/cement_all_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/8260/4963/files/hand_and_wrist_exercises_for_arthritis.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/wozikebajoduwoguzanewova.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/40584655938.pdf
    • https://cdn.shopify.com/s/files/1/0446/1549/9939/files/grammar_quiz_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/1372/6631/files/fiberosajo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/discrete_mathematical_structures_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/1943/6185/files/74437087964.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_off000066ae.bin
ff5278824f973a9943668a2114841aab17ff137d75b875bc4459cc792514811b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66AE 5296 bytes
font_01_sfnt_off000078bc.bin
0069ff2f5f0351031cb3e3a2bcdbd81942259cf19649898c4e0856c2b8dff6e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78BC 10160 bytes

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