Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a6d8872e9679cd…

MALICIOUS

PDF

40.7 KB Created: 2020-08-09 04:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78fff9d74e4baf6a9d849c4a2dd1854c SHA-1: 777390ed5dadd385a814ae8a9d27ad2e8735019d SHA-256: b1a6d8872e9679cd593444f14be133fa75e99ee8459ce875f1facba69be49d61
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified as a link farm, designed to redirect users to malicious infrastructure. The primary redirector URL is https://ttraff.ru/pify?keyword=como+funciona+o+cerebro+humano+pdf. The document body, though heavily obfuscated, contains the same redirector URL, suggesting a deliberate attempt to disguise the malicious intent behind a seemingly innocuous topic.

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.ru/pify?keyword=como+funciona+o+cerebro+humano+pdf
    • http://files.philweasley.com/uploads/1/3/1/3/131380889/bokipawowulaw.pdf
    • http://files.mwsphotostories.com/uploads/1/3/1/1/131164251/9992931.pdf
    • http://files.aximity.com/uploads/1/3/1/3/131398374/rulazajupusida.pdf
    • http://files.mydaughtercreations.com/uploads/1/3/1/4/131409677/lasojodagixu.pdf
    • http://files.warungfalafelbali.com/uploads/1/3/0/7/130738596/2439144.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/37063082891.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/gonarizekipojesol.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/mutogomesofetuwijozo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/9740702790.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/51465263250.pdf
    • https://cdn.shopify.com/s/files/1/0431/1161/2572/files/matura_angielski_poziom_rozszerzony.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/57755423053.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/zagegolufiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/garul.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_off00005df5.bin
91649af0d96eb910bf3506d2634673785f86fc912a4d1798226dd87f80fd13a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF5 5232 bytes
font_01_sfnt_off00006f8b.bin
76333ddf4fc3aecb462552c30430035877c6ed0c252b64668c6782cd9ead95f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8B 11276 bytes

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