Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebfb2f02b41402c1…

MALICIOUS

PDF

48.1 KB Created: 2020-09-09 19:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e25b9acbef6453db190058356bf11518 SHA-1: d235f5a5d786ffe5fbdb96a804fafd9141764e46 SHA-256: ebfb2f02b41402c16ef5ec2031c109249aa0fd6ee335395cc2a21364a66d40e7
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, including a critical redirector link to 'https://ttraff.club/wix?keyword=90x+game+booster+apk+free'. This indicates a social engineering attempt to trick users into visiting malicious sites, likely for malware distribution or phishing. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the document body is heavily obfuscated, but the presence of a link farm and a malicious redirector is sufficient evidence.

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.club/wix?keyword=90x+game+booster+apk+free
    • http://files.kearneyworks.org/uploads/1/3/1/0/131070678/4319461.pdf
    • http://files.ncnats.org/uploads/1/3/1/0/131069887/7645322.pdf
    • http://files.thepoordammfarmcreations.com/uploads/1/3/1/6/131637570/kapad.pdf
    • http://guvefap.ndsportschannel.com/uploads/1/3/1/3/131379478/wusogepesifefe-timevijatefa-tilijipozoki-xiwawaxariduki.pdf
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/48086011993.pdf
    • https://cdn.shopify.com/s/files/1/0438/8107/0747/files/celkon_smart_4g_flash_file_v14.pdf
    • https://cdn.shopify.com/s/files/1/0432/3518/0703/files/gigevopixififa.pdf
    • https://cdn.shopify.com/s/files/1/0438/1330/6530/files/navneet_cursive_writing_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/0379/6894/files/nebalovovefagerakaju.pdf
    • https://static.usrfiles.com/ugd/09273f_ad378552d83d4c48a6b42915c1e11713.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_046d7e78aa3b425999db2e10e7a38753.pdf
    • https://static.usrfiles.com/ugd/a91264_f07311fc0437470bb6c0cd5f3b96c197.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_f221ba0dfd574e4dbe357ddf7ac726df.pdf
    • https://static.usrfiles.com/ugd/b8c837_0fe6ca848f8b444f8be2538d1539486f.pdf
    • https://static.usrfiles.com/ugd/205ae4_a1aef1005b1d4faaa408bc2dd8bc1464.pdf
    • https://static.usrfiles.com/ugd/90423f_7a43c549845846c4a3cf0b10bde5379f.pdf
    • https://static.usrfiles.com/ugd/353d00_a1cc53377aa34859b0c1a56bf6d374f4.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cc3.bin
074dc40d2ba706504070543df84e269f7fc9effec05ad5ed623b1925b259bdd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC3 5664 bytes
font_01_sfnt_off00006feb.bin
a1c68180eae955d710b1f59d89b7b5bb1f22246194deffa7b9c3298859733f9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEB 2140 bytes
font_02_sfnt_off000079c3.bin
7d39878a1c4d68e409ed74cb75e3b9a6079c66e414ba353596f4d45f72f520d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C3 10500 bytes
font_03_sfnt_off00009d9f.bin
bcfecb9fde4b74e4a2b692e15caf305b2988a1cfe4c6386614002e38d35feb86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D9F 16168 bytes

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