Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda3508d6a162160…

MALICIOUS

PDF

46.1 KB Created: 2020-09-01 16:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 299e94cb7eb83f432266f84eb87d43e3 SHA-1: a161e88a1abacba12a1ada10bbf2c8dc82f76c14 SHA-256: eda3508d6a16216057e9ad7f7e1273147c64a5b7be3e4f4867161841689f95d9
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL and keywords related to Android data backup, suggesting a social engineering lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely for SEO manipulation or to distribute malicious content. The ML classifier 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.cc/wix?keyword=backup+data+android+no+root
    • https://static.u
    • https://static.usrfiles.com/ugd/b8c837_0ed2b38c3dc44d06acc5b060760ecce2.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_ef7a329f4c2a4cc6bd37bc693e4b4672.pdf
    • https://static.usrfiles.com/ugd/b8c837_90cbdfe5e4e44502bfc36b782c597e03.pdf
    • https://static.usrfiles.com/ugd/3826db_dace7503c8874fd3832a8307e708516a.pdf
    • https://static.usrfiles.com/ugd/ed64d2_8a666424d5954d6da3a9cafe117c370a.pdf
    • https://static.usrfiles.com/ugd/b8c837_39bf7b2487874174a36f653bbb01d6d8.pdf
    • https://static.usrfiles.com/ugd/f46427_58c945950d7b420aab1cf985c5eb3afc.pdf
    • https://static.usrfiles.com/ugd/07625c_eee5dbe0be4f4b7baeddbafc67c75e4f.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/nuvufimuwata.pdf
    • https://cdn.shopify.com/s/files/1/0437/2224/4246/files/dead_cells_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/zugizebesununapudaguki.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5239/files/sibugozosajexefed.pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3757/files/muguxipewumunobug.pdf
    • https://static.usrfiles.com/ugd/8ab72e_c92686e05e6547a7b542f55f26fbd98c.pdf
    • https://static.usrfiles.com/ugd/d94ae5_8f2c9e76ba4d4cc0b8702dfa55750dd5.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_off00006a37.bin
c4f86219427f12089f92794c025a6a376602b762376f9a13ceafb5eee4fc1837		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A37 4736 bytes
font_01_sfnt_off00007a49.bin
4852dffe08ff11cca1459192ace76816a9fc07179118a76b5742b02900cb652b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A49 10196 bytes
font_02_sfnt_off00009d4e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D4E 4324 bytes

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