Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f316a289afd85b3…

MALICIOUS

PDF

38.7 KB Created: 2020-08-19 07:39:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6cfa1c8fa5121b750d47262cecbe611 SHA-1: 77032398fa410ddd056213a98d5b8ae4c44b238a SHA-256: 4f316a289afd85b34175a75eeac35122662860129e69124b366bd9b7f397851a
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This indicates the document is designed to lure users to a potentially harmful website. The document body, though heavily obfuscated, also contains this URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content.

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.com/pify?keyword=naina+song+khoobsurat+movie
    • http://files.4energia.com/uploads/1/3/1/8/131856195/7147134.pdf
    • http://ferif.beeic.com/uploads/1/3/0/8/130873851/gabobonadag.pdf
    • http://files.collinsfamilyhomestead.com/uploads/1/3/2/6/132695388/degonilegitug.pdf
    • http://fezonoro.footballinmyblood.com/uploads/1/3/0/7/130740206/c581be4.pdf
    • https://cdn.shopify.com/s/files/1/0430/8094/1721/files/18490670617.pdf
    • https://cdn.shopify.com/s/files/1/0439/4529/6027/files/free_twistys_account.pdf
    • https://cdn.shopify.com/s/files/1/0430/7520/7322/files/24299429072.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/pedatopivo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7190/5698/files/solixepiduribifiluvavime.pdf
    • https://cdn.shopify.com/s/files/1/0429/0091/4343/files/6395725462.pdf
    • https://cdn.shopify.com/s/files/1/0438/2107/2546/files/40311164615.pdf
    • https://cdn.shopify.com/s/files/1/0428/4553/6419/files/factoring_polynomials_with_a_leading_coefficient_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4487/2090/files/tegafotezodifi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/3639527992.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_off00005048.bin
0bda18daba6cb68fd6b37dfdf0e1152e6b53150eae62087b9433886e129fe04b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5048 5300 bytes
font_01_sfnt_off0000622b.bin
741ea3589b1d615c21e32e1e035c34d0165d42f619647812c121edcf5725998c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622B 14156 bytes

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