Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c5632c50d262e76…

MALICIOUS

PDF

56.5 KB Created: 2020-08-30 20:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6547217c5e6e049452164023d6be4a36 SHA-1: c312af426c36d17cb26688c3af6c0d63f1fe1eec SHA-256: 6c5632c50d262e7614286e36e7aa21479229fe947c4861b1bd69321428facf32
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a link farm designed to redirect users to malicious infrastructure. One prominent link directs to 'ttraff.com', identified as a malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure users to potentially harmful content under the guise of academic information.

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=biotic+and+abiotic+factors+of+nitrogen+cycle
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6939/9452/files/bitbucket_commit_as_patch.pdf
    • https://cdn.shopify.com/s/files/1/0437/5478/2869/files/cours_d_algorithme_debutant.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/axe_i._o_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/8742/9785/files/ba_economics_honours_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/9534/9661/files/muwad.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6909/files/dadabibizo.pdf
    • https://cdn.shopify.com/s/files/1/0466/2309/6997/files/17491761944.pdf
    • https://static.usrfiles.com/ugd/19ce5d_e6261b878f5c40cbb1f34f5a678f86ad.pdf
    • https://static.usrfiles.com/ugd/217d68_3948f3d69dae43c7a225aaba3cc05d98.pdf
    • https://static.usrfiles.com/ugd/b8c837_48cf34bcc8344ce7b2b7ad903e84a5ca.pdf
    • https://static.usrfiles.com/ugd/aff7ca_c7d990f629b7474797352a44fa797b9b.pdf
    • https://static.usrfiles.com/ugd/76156b_614df756c2034c35b7c0120b6082f814.pdf
    • https://static.usrfiles.com/ugd/9904c2_187b19d606f3482997ab9de65d0703c8.pdf
    • https://static.usrfiles.com/ugd/2f07a1_6fd7aa22325c4ffd855e3fc4ae98a4b7.pdf
    • https://static.usrfiles.com/ugd/f523c3_8e227e659e574215948198306c49986b.pdf
    • https://static.usrfiles.com/ugd/b8c837_220ade6815ed48b7aa4d76abad028ef4.pdf
    • https://static.usrfiles.com/ugd/b8c837_81ca39a2bb984dfaaf0607ac5dc7eed3.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008823.bin
c9112ca37ea01be39f8021d0f916c28d0c273af307d50f42cff9be16544cdc7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8823 5480 bytes
font_01_sfnt_off00009ad5.bin
4e8719c82bda4df75606ce21cfe7835de58380ab43ec774e911683a9cf1424f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD5 10140 bytes
font_02_sfnt_off0000bd9c.bin
21f5268bf0b62bd4fabae467e71d5ad438fc59ae1a34ebb2f2ed053cae5044ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9C 16120 bytes

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