Malicious PDF — malware analysis report

Static analysis result for SHA-256 a86015ba4bd62c75…

MALICIOUS

PDF

50.4 KB Created: 2020-08-30 04:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3a534c241feed1b9903747bc3b308a0 SHA-1: f285eae3537ef4a01e1d910a13824644901b47d4 SHA-256: a86015ba4bd62c75064b6d8bd04106642575d9a09508ff18f7a1f2647e8a4fb0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. This indicates the primary purpose is to redirect the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious.

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=fuerzas+que+actuan+en+un+puente+colg
    • https://static.usrfiles.com/ugd/b8c837_31e17141cec84f3680680dc50bba2ba8.pdf
    • https://static.usrfiles.com/ugd/739437_9a7590c1122248198ca8e20512aaf49e.pdf
    • https://static.usrfiles.com/ugd/b8c837_dcdcae093c5d4f0183a0be9bb8c53f65.pdf
    • https://static.usrfiles.com/ugd/b8c837_179928909eac40b2b6fdd4043b1e727b.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e8dad06ab114994a11c46421c81dde1.pdf
    • https://cdn.shopify.com/s/files/1/0433/6762/8950/files/nimefaxibagorunagozituwe.pdf
    • https://cdn.shopify.com/s/files/1/0437/1723/0741/files/66632974582.pdf
    • https://static.usrfiles.com/ugd/ea78e0_1e3c02485da24d9e9c95b78b4f8248f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_97ced84cf33f4380a7f992ef97d4d2bd.pdf
    • https://static.usrfiles.com/ugd/b0b521_8e885c3259e14b8bb0d64d7843850b2d.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wadilizesiwegokadokepub.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/zejudidajomozotekurinozu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4786/1928/files/89598330170.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077bb.bin
6356e76b1700f54676301e877def809a44d9b600dda33688f4dd3bf4f784c5f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x77BB 5064 bytes
font_01_sfnt_off0000890a.bin
81870cef5a215b39fcfb57c8787ecd8b740cde0b3f9d89ac6ace1785c28e7156
pdf-font-stream PDF embedded font (sfnt) at offset 0x890A 11488 bytes
font_02_sfnt_off0000ae63.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE63 4324 bytes