Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e56e65db7366daf…

MALICIOUS

PDF

58.7 KB Created: 2020-08-31 18:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8937de0153c05a5be68ed9f9f7f04ff SHA-1: fde298f40fe94fab7e831855a2691c54e838caa7 SHA-256: 2e56e65db7366daf9922c4b786c0011978fe1238cb1da964b6a1654b3c2852a3
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as lecture notes, but the primary link redirects to a known malicious domain (ttraff.com). This indicates a social engineering tactic to lure users to a malicious site. 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.com/wix?keyword=gametogenesis+lecture+notes+pdf
    • https://static.usrfiles.com/ugd/850f07_3070ca512173423b8649d506db969e16.pdf
    • https://static.usrfiles.com/ugd/409ca8_b986ed606db344028015fef6f4219f4f.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a9c41132ada4ed8a25eb7fa1c4e5b61.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_37ecc281a70442549c0c39e72c8b7b97.pdf
    • https://static.usrfiles.com/ugd/22739b_1053eda9f3204314a4e5ad79181034ff.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/29155800522.pdf
    • https://cdn.shopify.com/s/files/1/0437/3741/5831/files/37182447285.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/22525238861.pdf
    • https://cdn.shopify.com/s/files/1/0428/6939/1527/files/jopefuwivaxigu.pdf
    • https://cdn.shopify.com/s/files/1/0463/3493/5201/files/hollywood_movies_dubbed_in_hindi_a_to_z.pdf
    • https://cdn.shopify.com/s/files/1/0444/1423/8887/files/19492751663.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/highway_to_heaven_season_5_episode_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/4730/2806/files/bohemian_rhapsody_piano_4_hands_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/3279/6574/files/jodevegijugenet.pdf
    • https://cdn.shopify.com/s/files/1/0435/5781/4431/files/gogarewuwova.pdf
    • https://static.usrfiles.com/ugd/b8c837_c59dde0f4c0644d98e617d6170bb45ed.pdf
    • https://static.usrfiles.com/ugd/3649d2_a376d75cd78b406a95644e10827508bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_33ed2aa250824ee2b529c83309b153c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_5cb0d87d43b643459f4b7d9c3d301034.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_off0000a6ca.bin
4414206002b765218f406d412ef946c9c75a2d48c2508dd85ca0ca3ea6a689cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6CA 5508 bytes
font_01_sfnt_off0000b96e.bin
52e432c1c2a80914980c97eb5691106f2f63de62574cecd78f4a8a63cf24eabd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB96E 10700 bytes

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