Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce7ad7ede970d876…

MALICIOUS

PDF

43.1 KB Created: 2020-08-31 05:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d761b1525b518e76eb5d0f9ff6479520 SHA-1: e0c21546efb6cac61873cadde0f8e8055fdd990c SHA-256: ce7ad7ede970d8761e505bb0a46e49a082f5097efbbb2124eb58623ac25aef25
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm designed for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/wix?keyword=how+to+get+maximum+charge
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/maluma_cuatro_babys_mp3_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/8447/9641/files/programa_borland_delphi_5_completo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9301/6232/files/test_angielski_gramatyka.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3481/files/sikaxilovogikikotokiginag.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/vepusukaseluxunekepot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77636621448.pdf
    • https://cdn.shopify.com/s/files/1/0428/6673/7311/files/wonolitazujor.pdf
    • https://cdn.shopify.com/s/files/1/0428/9898/1030/files/miriwo.pdf
    • https://static.usrfiles.com/ugd/760101_bd49e601813d4a3ba97dfa023703e860.pdf
    • https://static.usrfiles.com/ugd/73f3b0_3f36458eefe942c382e3d8774174ec7a.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac91687b732644d1821dfdf29abd2de2.pdf
    • https://static.usrfiles.com/ugd/e3ff21_8d4d6a8be8444cd0b9bb1c961fc6509a.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_off000050c7.bin
7f60bbd0d3446856658257af11b16cecf45ec4bf6e7012c877bbb2a7f9a00c3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x50C7 5804 bytes
font_01_sfnt_off00006499.bin
821915a85904f2fc8bbf9d1a161ff13da540625864a0ed3722dcd4b5ce21d3c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6499 5124 bytes
font_02_sfnt_off000075f9.bin
7d979faf2cb6ee2f034309672b884142ddca0470ef3be14db9590e410b3f6967
pdf-font-stream PDF embedded font (sfnt) at offset 0x75F9 13200 bytes