Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea82e608944f2e7…

MALICIOUS

PDF

38.5 KB Created: 2020-09-05 14:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 867ba46e4960608226e8fcd608c4b61b SHA-1: 23f2afbecf20c13767cdde3289ca0219004e7182 SHA-256: 1ea82e608944f2e7a606c32bf070d1a85d80897d13ad53a1c442fc722b8c4cde
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. Additionally, PDF_SEO_LINK_FARM suggests the document is part of a link farm, likely for SEO manipulation or to distribute malicious content. The document body, though partially corrupted, contains text referencing 'Carson- dellosa cd- 4301 answer key' and the malicious URL, reinforcing the lure. The primary IOC is the malicious redirector URL.

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.me/wix?keyword=carson-+dellosa+cd-+4301+answer+key
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/27209346521.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8805/files/40928267203.pdf
    • https://cdn.shopify.com/s/files/1/0462/2352/3994/files/free_will_template_state_of_texas.pdf
    • https://cdn.shopify.com/s/files/1/0434/8595/4198/files/rebarekexovofafofefak.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab6f624208d14055b47fa3dfeb5fb1d9.pdf
    • https://static.usrfiles.com/ugd/17ce20_feaa09783da34132af064ae942057c7c.pdf
    • https://cdn.shopify.com/s/files/1/0434/8500/3926/files/behavioral_neuroscience_marc_breedlove.pdf
    • https://cdn.shopify.com/s/files/1/0435/2399/7856/files/wilujusuvatu.pdf
    • https://cdn.shopify.com/s/files/1/0447/4172/2261/files/60391017244.pdf
    • https://cdn.shopify.com/s/files/1/0430/0010/3071/files/poguwilepekigi.pdf
    • https://static.usrfiles.com/ugd/67f5f7_3a4f637ac7f241bd9f51d71ebdd3e318.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e613051db29428982b4ca70f29232a3.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004935.bin
80bb8e598ebe4cef71a50af24f6feb56b4a9d982bc5f298fb77b164eb038ded8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4935 5352 bytes
font_01_sfnt_off00005b96.bin
8b2e19e5a3dbff7c05150b9246ee7ce2dad7b7adc728f195111d1daf06e1b8a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B96 10464 bytes
font_02_sfnt_off00007f50.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F50 4324 bytes

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