Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b15f3552ffab909…

MALICIOUS

PDF

45.5 KB Created: 2020-09-01 11:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 568cbfd925858532e0830bf5a4dd4a50 SHA-1: 5795c6c864b6878a0e2ff516433bce48d8f8b0e1 SHA-256: 5b15f3552ffab909ebc4a949e02bd98bfdf7eb919db039a83590981b88675995
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded URLs pointing to external PDF documents, a technique often used for SEO manipulation or to host malicious content. One of the primary URLs, 'https://ttraff.me/wix?keyword=hendaye+surf+report+magicseaweed', is flagged as a malicious redirector. The ML classifier also 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.me/wix?keyword=hendaye+surf+report+magicseaweed
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/5bb01c_a39cfaf4397e49e69640b0e62b475e66.pdf
    • https://static.usrfiles.com/ugd/ea78e0_e4911c96869647f08548a11a280fd798.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac4be774ca5b438e9e2f23ee1d73a232.pdf
    • https://cdn.shopify.com/s/files/1/0433/6405/7238/files/tamasha_songs_musicbadshah.pdf
    • https://cdn.shopify.com/s/files/1/0433/5747/0874/files/best_budget_app_android_uk.pdf
    • https://cdn.shopify.com/s/files/1/0436/1070/1981/files/lutejovuzup.pdf
    • https://cdn.shopify.com/s/files/1/0438/3975/0294/files/12821083101.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/doxikek.pdf
    • https://cdn.shopify.com/s/files/1/0439/4627/9080/files/24928029488.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/arquetipos_y_el_inconsciente_colectivo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/adjective_worksheets_2nd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0432/7391/2488/files/41701051870.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b1b.bin
c335aa4523c8501cf17b40581deb602f4ee8ebf3a0e497a51bae198a478e4e83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B1B 5480 bytes
font_01_sfnt_off00005dbd.bin
c46008e94734cf451533fdfb614e6fd1a562ed9493585cfcfdac0777516a3328		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBD 12684 bytes
font_02_sfnt_off00008609.bin
06d84a79787f49517cba9647d12dd77c675544b9e46e70dbd0c3ec2b8d2a160e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8609 16132 bytes
font_03_sfnt_off00009b02.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B02 4324 bytes

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