Malicious PDF — malware analysis report

Static analysis result for SHA-256 53f94fbedd3c84bf…

MALICIOUS

PDF

44.2 KB Created: 2020-08-12 21:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76145b8a20d15e21a867cd2daea50e86 SHA-1: 86d1ce8b888e84966344e9065bfbc8ff617f7b10 SHA-256: 53f94fbedd3c84bf0f90a37d5d0b7a231518d8fce511f928ca7d15f6e1f5cc9c
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wb?keyword=free%20online%20word%20to%20pdf%20converter%20without%20mail'. This URL is presented to the user as a lure for a free online converter. The document also contains a PDF link farm heuristic, indicating a large number of external links, many of which are hosted on Shopify but point to potentially malicious content. The primary malicious URL is the most critical IOC.

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.com/wb?keyword=free%20online%20word%20to%20pdf%20converter%20without%20mail
    • http://zoxifi.daleventrello.com/uploads/1/3/2/6/132682076/rominas-konig-voxagepesal.pdf
    • http://fovota.jpascalcreations.com/uploads/1/3/1/4/131438474/5335848.pdf
    • http://files.acezglobalgroup.com/uploads/1/3/1/3/131382113/bb67068c2cc99.pdf
    • http://files.rainonmain.com/uploads/1/3/1/4/131406592/nalivizatefofijez.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/livimaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0790/9794/files/66389159140.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/bibuburatopituxejuned.pdf
    • https://cdn.shopify.com/s/files/1/0439/6630/0318/files/gym_workout_for_beginners_to_lose_weight.pdf
    • https://cdn.shopify.com/s/files/1/0432/1984/5284/files/28796651455.pdf
    • https://cdn.shopify.com/s/files/1/0436/4438/7481/files/root_android_9.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/79835960679.pdf
    • https://cdn.shopify.com/s/files/1/0431/4143/1464/files/34623056438.pdf
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/1061911549.pdf
    • https://cdn.shopify.com/s/files/1/0434/4496/1442/files/xivaliwinomo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vewurobafug.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/kalod.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_off00006097.bin
534ba98bf7217bc05ce3638c768ba11b506ee2a43119f7890144e012c5e909e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6097 5208 bytes
font_01_sfnt_off00007234.bin
3c2f7cef0ed2c6bab6ee5213f1a51fb633761b96b10735b06432f11096b8820f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7234 10312 bytes
font_02_sfnt_off0000956a.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x956A 4324 bytes