Malicious PDF — malware analysis report

Static analysis result for SHA-256 269e7e4be9247059…

MALICIOUS

PDF

37.1 KB Created: 2020-08-02 18:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a8df6c60cdcebf69d032818384ffa30 SHA-1: 2146048e218752d36cc7bbc4606ebc02ff47ad1b SHA-256: 269e7e4be9247059a0ca49955e818b8d69ad8bbe767628884a4c3fcdd2fc8498
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'https://ttraff.cc/pify?keyword=manual+mitre+saw'. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'manual mitre saw', likely intended to trick users into clicking the malicious link. The ML classifier strongly supports the malicious nature of this PDF.

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=manual+mitre+saw
    • http://files.4assange.info/uploads/1/3/2/6/132695862/084551c.pdf
    • http://files.thornboroughandthorntonwi.org/uploads/1/3/0/7/130776514/lemirazokizit.pdf
    • http://files.leonkew.com/uploads/1/3/0/9/130969545/22efa0d725490.pdf
    • http://files.juliandhoward.com/uploads/1/3/0/7/130738597/4151eb1a09b0c0c.pdf
    • http://files.minsgallery.ca/uploads/1/3/1/4/131453060/a67db9b.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8515/files/boxavedo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0168/3865/files/18455917279.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/19875491416.pdf
    • https://cdn.shopify.com/s/files/1/0428/5241/7703/files/sujuxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/7194822083.pdf
    • https://cdn.shopify.com/s/files/1/0434/7166/7360/files/25870992638.pdf
    • https://cdn.shopify.com/s/files/1/0429/7228/3033/files/cr_2_monsters_5e.pdf
    • https://cdn.shopify.com/s/files/1/0429/8113/0394/files/10626788901.pdf
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/pusidatalaparo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/37407630447.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_off00005321.bin
7c92d04a82e446580d22e8c64d882447de253f7d5a8bfdba9d7955301ee64b31
pdf-font-stream PDF embedded font (sfnt) at offset 0x5321 4928 bytes
font_01_sfnt_off000063e6.bin
4af3cbfec5489bbb6ec81d88983c85f6a44b6f137448832e3018198be02002e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x63E6 10936 bytes