Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8c213110af9feac…

MALICIOUS

PDF

52.4 KB Created: 2020-08-31 05:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92b1103224907cec02130f81f3d4c511 SHA-1: b74a8661d9e55c1c92a12bf3302c7de6629fab38 SHA-256: c8c213110af9feacdf52d69b5617f73a18e189214933bb17efb5bb28c9a5ce9b
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One such link, 'https://ttraff.ru/wix?keyword=hernia+hiatal+pdf+elsevier', is flagged as a malicious redirector. The document body, though heavily corrupted, contains fragments of the target URL, suggesting the PDF's purpose is to trick users into clicking the malicious link, likely for phishing or malware distribution.

Heuristics 3

  • 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.
  • 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=hernia+hiatal+pdf+elsevier
    • https://cdn.shopify.com/s/files/1/0431/9431/9009/files/cardiac_sternal_precautions.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/zuzuposazorat.pdf
    • https://static.usrfiles.com/ugd/c8a981_0d9d3acff4a3459b9f267943e56f57fe.pdf
    • https://static.usrfiles.com/ugd/73cb9e_10494b9343034d31891ceec0a399dc09.pdf
    • https://static.usrfiles.com/ugd/b28561_37f3eee197df4e17a0fb09406ad86f00.pdf
    • https://static.usrfiles.com/ugd/0779a3_b8e1e3a7417441e8881ee52312f56d58.pdf
    • https://static.usrfiles.com/ugd/d162e3_607973dc4d9d4d0c99ddcb5de0b8b4bf.pdf
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/strategy_games_android.pdf
    • https://cdn.shopify.com/s/files/1/0427/5693/1751/files/dante_s_inferno_summary.pdf
    • https://cdn.shopify.com/s/files/1/0430/6246/0577/files/tetawokom.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/2016_us_holiday_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3101/files/rinizogigoxareru.pdf
    • https://static.usrfiles.com/ugd/fd7405_f17b3bb1d5844f409d75043f9ff65699.pdf
    • https://static.usrfiles.com/ugd/538d67_ea82f3764e4649d9922c088d7d0939a9.pdf
    • https://static.usrfiles.com/ugd/625844_9be48a3990244448ae520de916c3f0ca.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_8454196d63ae4bee99e1a62eb7bd9ad2.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7d06ffd7ee54146a207f73ea5f90603.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_off00007579.bin
d7f24ef3a420ad8a646a287f0b8f44e6e91919a367bf683b60c3cc5a7146fd80
pdf-font-stream PDF embedded font (sfnt) at offset 0x7579 4828 bytes
font_01_sfnt_off000085ce.bin
989cb49926052c6cb1c731554fcc6bb2394f51d8acaf00321ad1aaba6add8441
pdf-font-stream PDF embedded font (sfnt) at offset 0x85CE 15492 bytes
font_02_sfnt_off0000b629.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xB629 4324 bytes