Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b513e4530166546…

MALICIOUS

PDF

50.2 KB Created: 2020-08-23 21:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3049472bef4c88e3f20b5df0a2c3b1d SHA-1: 2db31400f7a5fb6b300ef6ecbed6c557d411c40e SHA-256: 1b513e45301665466a46300f9c513d3205dcd65e12353486f9fa4d50b189e3a0
150 Risk Score

Malware Insights

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

The PDF contains a clear lure for a "Kaspersky antivirus crack for pc", directly linking to a malicious redirector. The document body, though heavily obfuscated, contains the target URL. The presence of numerous embedded links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to distribute the malicious PDF. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=kaspersky+antivirus+crack++for+pc
    • http://files.aegiscoffeeroasters.com/uploads/1/3/1/3/131379039/vatajazezi_mexujowut.pdf
    • http://files.davidcmahlercomics.com/uploads/1/3/0/8/130874416/lezalojuzafijav.pdf
    • https://cdn.shopify.com/s/files/1/0430/0262/6202/files/16916920528.pdf
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/nutrition_information_burger_king_nuggets.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/31963806194.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/kexotibizuguluwix.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/cours_de_francais_niveau_debutant.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/smok_alien_220w_tc_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/child_couple_love_wallpaper.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/jurigegivewi.pdf
    • https://cdn.shopify.com/s/files/1/0462/5442/4218/files/recurrent_pericarditis_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0439/4015/1464/files/great_depression_causes_and_effects.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_off000078ae.bin
c8b3c23753bc6b94710c6b7fd9abbda02aaf032c2bfd96e0b89ee4bf588c9871		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78AE 5056 bytes
font_01_sfnt_off000089fb.bin
f251af208f2b0bcc47438f8d752936ba46157da9683ca4fb7490e78c4659ff28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89FB 10448 bytes
font_02_sfnt_off0000adab.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADAB 4324 bytes

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