Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6a276ba8670c212…

MALICIOUS

PDF

53.0 KB Created: 2020-08-04 21:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4aff312013f1a36d89587bdbcff5ee3 SHA-1: b47ccfaa2e536c702c1e82567e6d09a3f6653d05 SHA-256: c6a276ba8670c212da7c40166e2cf5ecbab79d9b7815d3703f280145c4af3c61
152 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.cc/pify?keyword=agile+frameworks+pdf'. Additionally, the document body, though heavily obfuscated, contains this same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely for SEO manipulation to increase visibility. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=agile+frameworks+pdf
    • http://files.plantwisdomgardencenter.com/uploads/1/3/2/3/132303406/ratorumatulag.pdf
    • http://files.wyliechoir.com/uploads/1/3/1/3/131381612/681009.pdf
    • http://files.ancientpromise.org/uploads/1/3/0/7/130739567/e3245.pdf
    • http://files.foolsandhorses.ca/uploads/1/3/1/4/131454065/tidosowixezewat.pdf
    • http://files.oliveandfinch.ca/uploads/1/3/0/8/130813042/bosaluvive.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6845/files/66461449779.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/kumubixugiwilidokuru.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/71869390881.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/23360335110.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7238/files/tom_and_jerry_matrix_game.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3846/files/nipafenebimonusegosaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/4070808389.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/79203162436.pdf
    • https://cdn.shopify.com/s/files/1/0431/6649/8965/files/33627823868.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/64937509765.pdf
    • https://cdn.shopify.com/s/files/1/0439/1777/0904/files/90737194009.pdf
    • https://cdn.shopify.com/s/files/1/0437/9898/6909/files/zepilubi.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_off00008fbe.bin
21138dbbc0aefc0fba3467dd9eef9de9aa503064c24d49ec19be67caaca756a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBE 5504 bytes
font_01_sfnt_off0000a27e.bin
f3f089abc9a77e9e732a5bfd29bc7f4f552a2c35a98babca5e9036e3fbd9ac8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA27E 10800 bytes

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