Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dbc579902461560…

MALICIOUS

PDF

33.5 KB Created: 2020-09-03 16:39:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a44f73369b6a456098f6ae7fafc1c222 SHA-1: 962b30366239ad149959a7f5446ebde3fbca97e4 SHA-256: 9dbc579902461560666cfab14444b118f13312f0248c186b94818fce1a56c4e7
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/wix?keyword=dell+r740+server+manual'. This URL is presented within the document body, disguised as a server manual, to entice users to click. The PDF also exhibits characteristics of a link farm, embedding numerous external links, many of which point to benign Shopify domains, likely as a camouflage or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=dell+r740+server+manual
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/nimeninunat.pdf
    • https://cdn.shopify.com/s/files/1/0471/0400/0150/files/bomejumatap.pdf
    • https://cdn.shopify.com/s/files/1/0438/2959/2214/files/ditagekevukokoguwa.pdf
    • https://cdn.shopify.com/s/files/1/0447/5430/5175/files/causes_of_inflation_and_deflation.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad32f1790ac84b249115abf8fa40ad1a.pdf
    • https://cdn.shopify.com/s/files/1/0437/2421/0326/files/91805490391.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/xafawixabamev.pdf
    • https://cdn.shopify.com/s/files/1/0437/1572/3414/files/ranemasibodatazijame.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6655/files/segmentos_de_la_arteria_cerebral_anterior.pdf
    • https://cdn.shopify.com/s/files/1/0464/7200/3734/files/tunuveno.pdf
    • https://cdn.shopify.com/s/files/1/0438/4469/8272/files/beverage_air_ucr48ahc-_23-_tg_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3651/files/34750745017.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_off00004658.bin
9f3e4284159cf22310b966d2023eff7ca1d293eae226008c572d9d357c0bc744		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4658 5200 bytes
font_01_sfnt_off00005802.bin
fa4f42c165c98760e93e5fd2605d9fd66cdcbc854b5be9d98829a9c1d92e6509		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5802 9832 bytes

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