Malicious PDF — malware analysis report

Static analysis result for SHA-256 71ceb3f2d25d27a5…

MALICIOUS

PDF

41.3 KB Created: 2020-09-03 00:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4737f951e29b8b02d6c96f9397f7eb44 SHA-1: bb72b780bdcf620c7653012713505886fd7f0b13 SHA-256: 71ceb3f2d25d27a5d24d01b5de38ffe70bca147b551d572a71181d30f28fd125
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 redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/wix?keyword=brother+in+arms+3+apk+mod+unlimited, which is likely used to distribute malware or lead users to phishing sites. The document body and heuristics indicate a deliberate attempt to create a link farm, potentially for SEO manipulation or to host malicious content.

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=brother+in+arms+3+apk+mod+unlimited
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/16a96a_f4ce27960347496586646433e38cc4e4.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_9ba0841c23774a1ba030a9a7281fb7b6.pdf
    • https://static.usrfiles.com/ugd/285be4_d1350fc8a4924aa5a40d2afb8bd8dc23.pdf
    • https://static.usrfiles.com/ugd/23924c_76dd32ff347f452d949cdfa8cf70d4b5.pdf
    • https://static.usrfiles.com/ugd/46429b_97d489eae1c642ecbda5ec40b464c7fe.pdf
    • https://static.usrfiles.com/ugd/607883_af7f7bf613b842a1944363503f29c1c2.pdf
    • https://static.usrfiles.com/ugd/ca300b_59b68148c82346b88e94fed18b291486.pdf
    • https://static.usrfiles.com/ugd/374ce0_00106995a15e43abad3b6f33eb66e219.pdf
    • https://cdn.shopify.com/s/files/1/0462/3099/5095/files/zijimoxovalilawapoxitok.pdf
    • https://cdn.shopify.com/s/files/1/0462/7680/4768/files/lone_wolf.pdf
    • https://cdn.shopify.com/s/files/1/0444/2200/4903/files/81974472467.pdf
    • https://cdn.shopify.com/s/files/1/0440/1129/0782/files/rupupepenidubop.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006103.bin
7662471ce0087044dd512ee858ef95e759d6cd9559bfb27b07807a645964dcc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6103 5476 bytes
font_01_sfnt_off00007373.bin
29d3660bc38374fe4302877b1f101dbf89927ae7b0d28df697ff5e79788fa9da
pdf-font-stream PDF embedded font (sfnt) at offset 0x7373 11148 bytes