Malicious PDF — malware analysis report

Static analysis result for SHA-256 919132702ced034d…

MALICIOUS

PDF

46.8 KB Created: 2020-08-12 08:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81db87ddd444ea18bda902003bac47a5 SHA-1: ace813f5183a7c5df74b56b84935be68f76301ed SHA-256: 919132702ced034dea6dc8a209931d9d8872c1bbd3111f7e16f3804dcceb4bcf
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=business+analyst+resume+sample+pdf', suggesting a lure to disguise the malicious redirection. The presence of a malicious redirector link indicates an attempt to lead the user to a harmful destination.

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=business+analyst+resume+sample+pdf
    • http://files.can-docoins.com/uploads/1/3/1/1/131164002/33991dc4b0469.pdf
    • http://files.dandressler.com/uploads/1/3/0/7/130775098/soxuz.pdf
    • http://files.tofubox.shop/uploads/1/3/1/4/131482997/5257344.pdf
    • http://satinat.framin-gallery.com/uploads/1/3/1/6/131636948/pekanod-xedofepudeve-nopovow-lajofobekapupa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/50384889657.pdf
    • https://cdn.shopify.com/s/files/1/0435/1547/8176/files/dabug.pdf
    • https://cdn.shopify.com/s/files/1/0434/2883/9586/files/13354419452.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/42012309142.pdf
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/20070560155.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2674/files/82605311878.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0201/files/jifugegowojasoxutaporo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0057/files/cardiology_free_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/3661/3544/files/27390497993.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1164/files/credit_cs50_solution.pdf
    • https://cdn.shopify.com/s/files/1/0433/1051/4334/files/40466197937.pdf
    • https://cdn.shopify.com/s/files/1/0434/5780/6503/files/towetaba.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8164/files/29563254389.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/2375622922.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_off00007810.bin
85f1c3447a08617e2f69f04a684e2273567a2cd467dd4f9a60308811c246d91e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7810 5336 bytes
font_01_sfnt_off00008a29.bin
86f83f781204bda5b5e3b131e66235485ff6bbd31418b85e3927203af88df0c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A29 10400 bytes

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