Malicious PDF — malware analysis report

Static analysis result for SHA-256 b509a614ef46deda…

MALICIOUS

PDF

41.7 KB Created: 2020-08-05 09:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae793fb3557cbaa3b9eb082c5e48fc36 SHA-1: b4ef919b7081c2806f5522893bef0d5d30ce7845 SHA-256: b509a614ef46deda2657e1c3e50760e2b29fff03764e32031f8ee81104a83dab
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, specifically pointing to 'https://ttraff.cc/pify?keyword=capturing+the+devil+pdf+free'. The document body, though partially corrupted, also contains this URL and references to downloading a PDF, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to attract search engine traffic, further supporting the lure-based attack pattern. No scripts were extracted from this sample.

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.cc/pify?keyword=capturing+the+devil+pdf+free
    • http://guzapu.mastermindforce.com/uploads/1/3/1/6/131637316/xulizavapisaloteva.pdf
    • http://files.robertmwood.com/uploads/1/3/1/4/131438240/muxexisi-ralipidibapozo-nunazivejigu-xigavuxawudi.pdf
    • http://files.iifbc.com/uploads/1/3/1/8/131856173/sonumerepez_zipowux_sexomu_tovuwaf.pdf
    • http://files.solomonbrookfarm.ca/uploads/1/3/2/6/132681954/dc230d2ef7e2b6a.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/64067108000.pdf
    • https://cdn.shopify.com/s/files/1/0432/0509/9675/files/jisokabuwidejotaturumo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6891/5863/files/vudazotagazuvosusat.pdf
    • https://cdn.shopify.com/s/files/1/0431/1305/4357/files/15298671001.pdf
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/1215200307.pdf
    • https://cdn.shopify.com/s/files/1/0440/7335/3366/files/itextsharp_c_getting_the_comment_from.pdf
    • https://cdn.shopify.com/s/files/1/0431/9736/6436/files/mozulos.pdf
    • https://cdn.shopify.com/s/files/1/0433/7762/3201/files/while_loop_in_bash.pdf
    • https://cdn.shopify.com/s/files/1/0440/0034/6270/files/22921784160.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7904/files/74125784067.pdf
    • https://cdn.shopify.com/s/files/1/0441/0923/4328/files/the_number_devil.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7584/files/dupilowesibanisuw.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_off00005a87.bin
e37d8819dfedf57bcb4360e6c5e854e79623d77b1c322627e38b1e74a98adb4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A87 5092 bytes
font_01_sfnt_off00006bd6.bin
5a19e7dc4c8253b20ca164db4d16b86f3a07e3e78bcf72ca2d446390d6446508
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD6 2072 bytes
font_02_sfnt_off00007588.bin
021e72c10e945f27665ce7bb1bb8e8b6a5946ea4ebbe0f803cdaef322f3645ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x7588 10572 bytes