Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b7a2e45873bed6e…

MALICIOUS

PDF

71.0 KB Created: 2020-08-22 22:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6e43bc1dc4dd7d1684f4afa58afda82 SHA-1: dedf48f4da8808891c9f285966b80b698acf99df SHA-256: 4b7a2e45873bed6e6a9331b529383e240a6a6748d52590b145ac168e953f67ef
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a prominent link that redirects to a malicious URL, disguised as a guide for creating bootable USB drives. This link is identified as a malicious redirector. The document also features a large number of external links, many pointing to Shopify, suggesting a link farm for SEO manipulation or to host further malicious content. No scripts were extracted, but the primary malicious activity appears to be the redirection to the ttraff.com domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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.com/pify?keyword=rufus+create+bootable+usb+flash+drives
    • http://doraxufi.katieriffe.com/uploads/1/3/1/0/131069935/53df63e.pdf
    • https://cdn.shopify.com/s/files/1/0438/0763/7661/files/46542707647.pdf
    • https://cdn.shopify.com/s/files/1/0444/4746/5639/files/99927350845.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/fuel_cell_engines_mench.pdf
    • https://cdn.shopify.com/s/files/1/0457/3347/8566/files/identifying_theme_in_poetry_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/0963/7533/files/78723310636.pdf
    • https://cdn.shopify.com/s/files/1/0435/0361/6165/files/zakapinexivuwazazu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4125/9671/files/gasisinupilaxafitaxule.pdf
    • https://cdn.shopify.com/s/files/1/0439/1793/4747/files/sasozusurege.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/16241603264.pdf
    • https://cdn.shopify.com/s/files/1/0431/5516/1252/files/character_strengths_inventory.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 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off0000d615.bin
d5947e66eba0daa87c8a4e27de39a29c1089889fbdf91a341b0ba644b70a0bea		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD615 18472 bytes
font_00_sfnt_off00006543.bin
73e38f75a30ada902125e731cd18a9a417d580df8041274ea69537abd37a1864		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6543 6032 bytes
font_01_sfnt_off00007a24.bin
8d4baab899dfac9de7b10c02ca7ba6bfbd1f90b9b69531bb04f873a5046e8734		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A24 5316 bytes
font_02_sfnt_off00008c2e.bin
b26921add8578393818b3bdf9e2c7a7d1f43cb19ce76009274ed6230ed2c25b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2E 4140 bytes
font_03_sfnt_off00009949.bin
0b8363bc9e07cf89205331d27bc1c31e4fc91592bb846ce71245372e642e4983		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9949 6148 bytes
font_04_sfnt_off0000a929.bin
4db516c6a0cb797d6e2f638493bb88f7d2913dc28b160541c206b0d65cf719ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA929 13836 bytes
font_06_sfnt_off0000f3c5.bin
4731cd301a7a5a42cc4d29c767753cdd2741619edac511969d4641f506eef8ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C5 2752 bytes
font_07_sfnt_off0000fef7.bin
89aa5ef39ecd647c310fa7d43209dd0d208a608e38381102f2e40635d4f29b56		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF7 2608 bytes

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