Malicious PDF — malware analysis report

Static analysis result for SHA-256 f384adaceab4195c…

MALICIOUS

PDF

43.0 KB Created: 2020-08-07 13:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8f6f6a6df675d2b77bda1684645a5f0 SHA-1: e02573a3c772f2fe5c00c166b89bcca848b14257 SHA-256: f384adaceab4195ce55ed8aebd5c051189f3865890aa1be10c2992ee63e7ca6e
150 Risk Score

Malware Insights

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

The PDF contains a high number of external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary goal is to redirect the user to a malicious site. No scripts were extracted, limiting the analysis of further stages.

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.cc/pify?keyword=star+spangled+banner+piano+free+pdf
    • http://files.rockvalleydistillery.com/uploads/1/3/1/4/131437822/dunavunurupevu.pdf
    • http://kodabo.petervinthagen.com/uploads/1/3/0/7/130740178/kurubizef.pdf
    • http://files.vinylbandits.com/uploads/1/3/2/6/132695438/supubofel_kokuborekikurug_limodudotinowit.pdf
    • http://files.nurseontherun.net/uploads/1/3/1/6/131637385/4648c81687.pdf
    • http://files.ottercoffeevergas.com/uploads/1/3/1/6/131636806/dasavesapaxuzutibep.pdf
    • https://cdn.shopify.com/s/files/1/0430/9752/2329/files/14055050170.pdf
    • https://cdn.shopify.com/s/files/1/0433/7719/7221/files/89847710113.pdf
    • https://cdn.shopify.com/s/files/1/0448/2249/5389/files/tricky_lateral_thinking_puzzles.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3898/files/95428675040.pdf
    • https://cdn.shopify.com/s/files/1/0429/5006/6339/files/4946203235.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/11036720893.pdf
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/33562179960.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/98628395313.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90262961418.pdf
    • https://cdn.shopify.com/s/files/1/0429/9934/9407/files/annabel_lee_poe.pdf
    • https://cdn.shopify.com/s/files/1/0438/4001/2450/files/64347061076.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_off000067bd.bin
fc1b34ba0e3a6d193f24a93736f66e57ee2e2a44c27a0b6430dfbbe60a15b1ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BD 5452 bytes
font_01_sfnt_off00007a4a.bin
b45d28b456a7d10152e0dcc09f8ee9ca884de80ed3116da33a8e9460a7a8a2cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4A 10336 bytes

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