Malicious PDF — malware analysis report

Static analysis result for SHA-256 f57dc87ed74fbcc5…

MALICIOUS

PDF

37.3 KB Created: 2020-08-05 05:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76ef4804e0eacc8d0f758f1df8186abd SHA-1: f757ef397c24373f78046d32235a40ad01cd58a4 SHA-256: f57dc87ed74fbcc58de7a1810c1e37e02a7afa01c5c4f2770214e844ddfa1e36
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on Shopify, likely as part of a link farm to improve search engine ranking for the malicious content. The primary intent appears to be directing users to the malicious redirector.

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=action+verbs+worksheets+for+grade+2+pdf
    • http://files.mikericesports.com/uploads/1/3/1/4/131438188/76733f.pdf
    • http://files.hilltaxis.co.uk/uploads/1/3/2/3/132303359/vijepepuwiki.pdf
    • http://files.centerrec.com/uploads/1/3/1/4/131453054/fowasadomafexud-juledawuxisu-laromimasifolaw-pefulapazavim.pdf
    • http://files.allieetoile.com/uploads/1/3/0/9/130969352/994304.pdf
    • https://cdn.shopify.com/s/files/1/0434/4889/3606/files/92719256566.pdf
    • https://cdn.shopify.com/s/files/1/0432/1610/9736/files/soccer_coaching_attacking_drills.pdf
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/40823920251.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/ginudareweduvolewu.pdf
    • https://cdn.shopify.com/s/files/1/0436/7872/8345/files/50_shades_of_grey_book_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/magic_training_guide_rs3.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/nebupaxanulerad.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/latuxamakivurikesu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/pink_line_metro_route_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/titapotexovugerumoso.pdf
    • https://cdn.shopify.com/s/files/1/0431/5748/7778/files/64874825448.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/324396245.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_off00005280.bin
db0183049a5392a39eac83761217194fc1c7c2f443585fea8f0008aa7a508bb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5280 5864 bytes
font_01_sfnt_off0000668c.bin
8aa45a09b7287c1a9161aea07a1b12201f01512b604d3c919ce0a3f5b5a074e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x668C 9876 bytes

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