Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2af8ae365e19b9…

MALICIOUS

PDF

39.4 KB Created: 2020-08-20 07:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdc25a929e73c0ea92acf8045ece612c SHA-1: f8c25f39c18ae558cd77b133080a7560e6a86d84 SHA-256: ed2af8ae365e19b90f511edf39d5f2ae672674f4518ca514718bce71f20e0e6d
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.com, which is part of a link farm. The document body also contains the same lure text and URLs, suggesting a social engineering attempt to trick users into visiting malicious sites. The ML classifier strongly indicated maliciousness.

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.com/pify?keyword=happy+birthday+wallpaper++with+name
    • http://files.balloonsbyjessica.com/uploads/1/3/2/6/132681740/4575432.pdf
    • http://files.aaronsspeedshop.com/uploads/1/3/1/3/131378774/lejodu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3863/7208/files/38978032482.pdf
    • https://cdn.shopify.com/s/files/1/0440/7610/5893/files/kutumifogago.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6695/files/belt_and_road_initiative_for_win_winism_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/dekobegavowazalorot.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/nojebajibulefow.pdf
    • https://cdn.shopify.com/s/files/1/0454/3918/9142/files/najexutozekadoxib.pdf
    • https://cdn.shopify.com/s/files/1/0434/4768/1191/files/faxuvuwon.pdf
    • https://cdn.shopify.com/s/files/1/0437/3587/5749/files/70700032383.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8104/files/dolajikojomajematafidejo.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_off00005c67.bin
d9cc00aae4d107d6d2f596dbeb554b57c0e47aa8873b31101f5ee780ec4c7093		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C67 5316 bytes
font_01_sfnt_off00006e57.bin
d50eaa9256071dd3b3eaea6db81bbbf645396d46e8ddffab1c2e59782d8dd090		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E57 10088 bytes

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