Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a7f34b90ddd63b…

MALICIOUS

PDF

58.1 KB Created: 2020-08-31 03:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1f76eb31519fb588b82ae4ecfb5edef SHA-1: b16fcf6a2b758554f5dddf21b6f78c7da50943b3 SHA-256: 17a7f34b90ddd63b50ee34e4e0c176099a73e50dd669b2b40f44225809f64209
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to a link farm designed to redirect users. The primary malicious URL identified is https://ttraff.ru/wix?keyword=yakuza+0+jav, which is flagged as a known malicious redirector. The document's content, though heavily obfuscated, appears to be a lure related to "Yakuza 0 jav" to encourage clicks on these links. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.ru/wix?keyword=yakuza+0+jav
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_a14da25cc78048a3a60dba82ab30c952.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_f2573ff2b526451199d1aeecfb1c6d5a.pdf
    • https://static.usrfiles.com/ugd/3649d2_06ea312aa90e4e859f0a78cfcc287d9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5ee22d5d4194382b5ba869f65d86ee1.pdf
    • https://static.usrfiles.com/ugd/451461_844aff96440d45af878577b495fb8287.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/58856573387.pdf
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/82463281079.pdf
    • https://cdn.shopify.com/s/files/1/0429/5619/3955/files/zebenedawumepeko.pdf
    • https://cdn.shopify.com/s/files/1/0431/0401/0389/files/66226291714.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2255/files/levugularasufabopuzat.pdf
    • https://cdn.shopify.com/s/files/1/0431/0568/1562/files/toram_leveling_guide.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008947.bin
583a86518ce5a0068f17533707b04facbaf553f6719c7a79eb22dc7a9ccf9ea9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8947 5076 bytes
font_01_sfnt_off00009ae0.bin
7fb498ab5a20ca80b7c9874c9bbe370e960e1c58e40d72dad7ef00b36bc517ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE0 4728 bytes
font_02_sfnt_off0000ab20.bin
0b9133816ade70e3adfb46b083cea1e7b1e34806ff14989fa7e3ab6e1fef8cda
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB20 15636 bytes