Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd105ed0bb1c170f…

MALICIOUS

PDF

76.3 KB Created: 2020-08-09 00:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9824b5be52662a40c9e5ee7b2708343f SHA-1: 7e98a95f3db2876162049c2d60a4e96f38845268 SHA-256: bd105ed0bb1c170f6d147dda991a49fac348ca38f1f5c4f1ce4d1c03ed6a02fd
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=eduardo+galeano+el+mundo+patas+arriba+pdf`. This URL is presented within the document body, disguised as a search result for a book. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to benign content on Shopify, but the primary malicious URL is the clear indicator of compromise. The ML classifier also strongly flagged this PDF as malicious.

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=eduardo+galeano+el+mundo+patas+arriba+pdf
    • http://files.fredcarley.com/uploads/1/3/0/7/130740325/maluf-vivuzabavuvaf.pdf
    • http://files.thegiveagency.ca/uploads/1/3/2/3/132303351/c6d1bf7e23b9.pdf
    • http://gaxoja.cococarinamk.com/uploads/1/3/1/4/131407089/wubid.pdf
    • http://files.hunyuansingapore.com/uploads/1/3/1/3/131383777/2132629.pdf
    • http://files.revolutionscayman.com/uploads/1/3/1/4/131453917/2517064.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8241/files/agile_sdlc_methodology.pdf
    • https://cdn.shopify.com/s/files/1/0433/8748/6358/files/smash_bros_n64_rom.pdf
    • https://cdn.shopify.com/s/files/1/0433/7913/0524/files/newivifasijufowudog.pdf
    • https://cdn.shopify.com/s/files/1/0431/9520/3745/files/44781874859.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/81650348850.pdf
    • https://cdn.shopify.com/s/files/1/0430/8906/8185/files/53958725679.pdf
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/19136486835.pdf
    • https://cdn.shopify.com/s/files/1/0433/4734/5573/files/ginima.pdf
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/gotasisozixeko.pdf
    • https://cdn.shopify.com/s/files/1/0433/5966/6341/files/vopofoseno.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/60765044439.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/craftsman_model_917.pdf
    • https://cdn.shopify.com/s/files/1/0436/1617/4237/files/eve_mining_guide.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_off0000eb4d.bin
203745bd1d62d6217c0fb95a343c86467059b5614528a8498c9213a55c7d643b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4D 5460 bytes
font_01_sfnt_off0000fdc4.bin
08f590f10191aa80f66343f0a99b06e15c849d0d1b4eb43a75c2aa1f6d8ddfd2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC4 11656 bytes