Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eef135049169777…

MALICIOUS

PDF

46.2 KB Created: 2020-08-30 15:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 146c51953abde06baaec7f0155ae7781 SHA-1: 5331c251555d25e2af756d447b70d4e16bda53b1 SHA-256: 0eef135049169777f542228905856d72f0ded04b13bc2937128e63be458ca4a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for a "final draft crack" and embeds a link to a known malicious redirector. This redirector likely leads to a link farm of other PDFs, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the malicious redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.link/wix?keyword=final+draft+crack
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/822ecd_7fdf0d4e55d34da390b13e8487109190.pdf
    • https://static.usrfiles.com/ugd/8b97dd_e8dc2edbc97c4ad48de2e747b9dd2ac3.pdf
    • https://static.usrfiles.com/ugd/b8c837_184605fc11674d478a35889a102d8248.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b43c36551df486a99cca52e01e9887d.pdf
    • https://cdn.shopify.com/s/files/1/0433/6356/5718/files/87817112344.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/basugogigarerebid.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/tisogejogega.pdf
    • https://static.usrfiles.com/ugd/b8c837_50c2136ffa7a4ac988b5cd84905a140d.pdf
    • https://static.usrfiles.com/ugd/63022f_d86ff279f772411784a0ea759cda0085.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f776df66d0d40f7ade6c47fe730638f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a869920c2be9433d96f3d89cfd14d061.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zurutadodusabexefiba.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/avenues_college_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0430/0328/1571/files/bowapodijabowotog.pdf
    • https://cdn.shopify.com/s/files/1/0464/7298/6774/files/guidelines_for_giving_feedback_in_the_workplace.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000621d.bin
e760cb22dcddf1169c6320e2fc74d06a125c4af361edbce15821be4c05765e47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x621D 4416 bytes
font_01_sfnt_off0000710d.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710D 1800 bytes
font_02_sfnt_off0000799a.bin
580567a53b1fab5d6943ce02516ebdf296ff5b96e0708d5cd944b0ff582133d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x799A 10572 bytes
font_03_sfnt_off00009d85.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D85 4324 bytes

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