Malicious PDF — malware analysis report

Static analysis result for SHA-256 d13925b68b27708f…

MALICIOUS

PDF

47.5 KB Created: 2020-08-30 16:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3057b2973bfb3f1f31408eef4b456a41 SHA-1: a0e9ac6baa3e35d0e82eb6df824d448f8e3caeaf SHA-256: d13925b68b27708f8a340c60c4623c59165266256e13b8861ca19b75567858ef
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This indicates the document is designed to lure users to a potentially harmful site. Additionally, a PDF link farm heuristic suggests the document is part of a larger SEO manipulation effort to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=film+japonais+streaming+vostfr
    • https://cdn.shopify.com/s/files/1/0433/0956/4068/files/30xa_carrier_chiller_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0435/2599/6698/files/76073781902.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/gabi_espadrille_platform_sandal_steve_madden.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3437/files/latilagufovitekakorad.pdf
    • https://cdn.shopify.com/s/files/1/0440/7430/3640/files/r_predict_function.pdf
    • https://cdn.shopify.com/s/files/1/0439/6980/6494/files/aneurisma_de_aorta_abdominal_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0465/4530/5750/files/c_dllexport_template_class.pdf
    • https://cdn.shopify.com/s/files/1/0427/6885/9303/files/kptcl_junior_assistant_question_paper_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/1208/8231/files/77761948317.pdf
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/pigodijoguzarev.pdf
    • https://static.usrfiles.com/ugd/5a1791_4f3af6d188aa4ac1bda953aae8245c46.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_7d44c4c9e20740018f5f1a769363c5c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e9824299a554abc8e5ff03263e283e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce980da358dc4df8a36479e9eed292b7.pdf
    • https://static.usrfiles.com/ugd/493135_52b92e3bd2a64f5e95dc065def9f792b.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000768d.bin
3039c3cc455e6b156388dd0650a24ed0393e7585f4c7681eb1c5b5dd310bb427
pdf-font-stream PDF embedded font (sfnt) at offset 0x768D 5312 bytes
font_01_sfnt_off00008893.bin
a8a25ec513af99b3441d943ada5b1235908f31c163fadaea41649bb7b901d76b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8893 13320 bytes