Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa9251481d36a47…

MALICIOUS

PDF

73.9 KB Created: 2020-08-29 22:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7cb3d8fcb72c2d1b9f58ef428953653 SHA-1: 58ffad464c1bff683e925eb6e527215c9fafe5c7 SHA-256: 5aa9251481d36a47979bc192bb4b303cfe68a0ac1d3a3ea362781cac75c7361b
194 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, disguised as a download for 'Euro truck simulator 2'. The document body is heavily obfuscated but contains the malicious URL. The presence of a link farm and the ML classifier's high confidence score further indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=euro+truck+simulator+2+saglamindir
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1275/1523/files/bexisinafe.pdf
    • https://cdn.shopify.com/s/files/1/0436/2610/2947/files/bhajan_video_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0434/1376/6293/files/gidazobedujif.pdf
    • https://static.usrfiles.com/ugd/b8c837_885af6201ff048b087ed5d83db6c7ee1.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c74718e4fbe434ea351fb67400623f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_49e62822bb86404787bba61d8a9d2eb8.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6daeec956dc4b1891dab3b63d0089a3.pdf
    • https://static.usrfiles.com/ugd/d162e3_f66bbf1cfd4d43d88717b560963a2962.pdf
    • https://static.usrfiles.com/ugd/c6ac46_6167aeb0917347bc94e4aa615f9c254a.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/peboxev.pdf
    • https://cdn.shopify.com/s/files/1/0428/6211/7020/files/counter_strike_1._5.pdf
    • https://cdn.shopify.com/s/files/1/0431/2409/7191/files/34609230852.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3110/files/95786809151.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4b5.bin
7d53254f8b02b7e09cd41e7f235be9c27ece2ed864227b83a744d3cdd3ff1e62		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B5 5412 bytes
font_01_sfnt_off0000d70e.bin
07a7951757d7cbe13517e4050d5fd40433b3d09514c4b40e16f3422b736d990f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD70E 14508 bytes
font_02_sfnt_off00010342.bin
25da4d0259edcb98e59a4fe79427651a73902f0cb209792fc7f5803c2d85b23e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10342 16616 bytes

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