Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdbeab0478dfa570…

MALICIOUS

PDF

40.5 KB Created: 2020-09-02 15:09:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76c6e3d86bd8a6de1dc719d7174a384f SHA-1: 257b27a71335427287f9da89efa3bb135470c9f1 SHA-256: cdbeab0478dfa570370ab4f1e5985ef31b2a8b656332557758d598d8cda4f7b8
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a PDF link farm. One of the primary links directs to a known malicious redirector infrastructure at 'ttraff.club'. While many other links point to 'cdn.shopify.com' and are labeled as confirmed benign, the presence of the malicious redirector suggests a phishing or malware distribution attempt. The document body contains garbled text and a URL that appears to be the same as the malicious redirector.

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.club/wix?keyword=plant+molecular+biology+reporter+abbreviation
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/prenatal_mouse_brain_atlas.pdf
    • https://cdn.shopify.com/s/files/1/0429/4233/3084/files/48972147759.pdf
    • https://cdn.shopify.com/s/files/1/0437/2699/5621/files/wezimituvasu.pdf
    • https://cdn.shopify.com/s/files/1/0462/3899/0485/files/the_metamorphosis_study_guide_answer.pdf
    • https://cdn.shopify.com/s/files/1/0433/6209/1167/files/88761924186.pdf
    • https://cdn.shopify.com/s/files/1/0427/9861/2636/files/57475813611.pdf
    • https://static.usrfiles.com/ugd/12f4eb_f359fc3f87c94c6fa0c5aaf9fcb58232.pdf
    • https://static.usrfiles.com/ugd/b4f0c6_aa550ecb34ba4a66b4cf75270cdc5e58.pdf
    • https://static.usrfiles.com/ugd/3d514e_f1801d90933b4e05b9decd100989789d.pdf
    • https://static.usrfiles.com/ugd/d5415a_3b390feb0f6f4e6094f942cb1ef986d3.pdf
    • https://cdn.shopify.com/s/files/1/0438/2969/0525/files/papujupovab.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/90571893274.pdf
    • https://cdn.shopify.com/s/files/1/0430/2821/8010/files/xibiwubeped.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/wrist_physical_therapy_exercises.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_off0000604b.bin
10ecc429b767399d5042a2fb63d88e6946bae60cf220a95b9128b6a4ef1f759c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x604B 5380 bytes
font_01_sfnt_off00007294.bin
7d0b44f4dfde47552a54cda97c311b9741bf8b4e8cb65679aec9f146f8a2825f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7294 9980 bytes

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