Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6c28ab6c8f33ff…

MALICIOUS

PDF

47.0 KB Created: 2020-08-31 18:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f6983a791dba2952363f0dda9c9d37a SHA-1: 3548d96aa69a4c687adf41efec7ff3bc84f568cf SHA-256: dc6c28ab6c8f33ff2ffde89d27ffd3ec1a3790613cca62a874fb590234c82575
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=risk+analysis+report+for+construction'. It also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains references to the same malicious URL and benign-looking PDF links, suggesting a lure to disguise malicious intent. The presence of a 'download button' heuristic further supports the idea that the user is being prompted to click a link.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/wix?keyword=risk+analysis+report+for+construction
    • https://static.usrfiles.com/ugd/b8c837_10d67812611b4847826248b5193855b4.pdf
    • https://static.usrfiles.com/ugd/824332_8e58331d0027471894afe5c68211691f.pdf
    • https://static.usrfiles.com/ugd/b8c837_04cff1fba101469d8086848e1e7b3807.pdf
    • https://static.usrfiles.com/ugd/b8c837_82215c7f92a84d68842c521fdb60dc0b.pdf
    • https://static.usrfiles.com/ugd/79e0dc_d72c0db0b4504fcbb856082058ca5623.pdf
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/nijotige.pdf
    • https://cdn.shopify.com/s/files/1/0432/5815/1070/files/33851524351.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/80761785793.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52665001447.pdf
    • https://cdn.shopify.com/s/files/1/0433/7637/8014/files/riravilijamelaviwefoju.pdf
    • https://static.usrfiles.com/ugd/cc14e4_a2d852ad61cb4329b961fbb93a93d79a.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_eded6f4176f94e4883f747b2afe05cb5.pdf
    • https://static.usrfiles.com/ugd/ab922d_b477159564d6479cb534f2149e1283c5.pdf
    • https://static.usrfiles.com/ugd/ca300b_cd93b45bd09d4482bef09752f2d4aea8.pdf
    • https://static.usrfiles.com/ugd/37428b_0a8ae18aff4b492b90c85a127c4e0759.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/introduction_to_financial_accounting_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/7592/8215/files/wugipa.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5003/files/nixodoko.pdf
    • https://cdn.shopify.com/s/files/1/0429/9459/8047/files/90439907709.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_off0000790a.bin
3865ad08ee6318b0086f08e33a7fdff94459ba9553d41daede4fc368e111ed3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x790A 5180 bytes
font_01_sfnt_off00008ad1.bin
3b4b5ecbae97ddfd2889b9323cb01ee97e56d6be76ff6033581e09efe64b5690		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD1 10560 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.