Malicious PDF — malware analysis report

Static analysis result for SHA-256 99135bf7bcb32524…

MALICIOUS

PDF

40.4 KB Created: 2020-08-17 05:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b75819e9d7e247d3fcf611f6f0e96284 SHA-1: 3ecaeca532c15ac5717bd11756adef1f9455c422 SHA-256: 99135bf7bcb32524406bd22cb8dc963d2c86909c45a1fb52f521975d58fa3235
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.001 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com' with a keyword related to TeamViewer. This aligns with the 'Remote-support tool lure' heuristic, indicating the document's intent is to trick users into downloading or interacting with remote support software. The document body, though heavily obfuscated, contains a reference to the same URL. The presence of a link farm further suggests malicious intent.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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/pify?keyword=teamviewer+9+uptodown
    • http://memije.goodspeedwatches.com/uploads/1/3/1/4/131454106/62e3dc412b.pdf
    • https://cdn.shopify.com/s/files/1/0430/9296/7581/files/berliner_platz_4_neu_wortschatz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0002/0635/files/48766218682.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/23183373092.pdf
    • https://cdn.shopify.com/s/files/1/0437/4131/5223/files/79437735712.pdf
    • https://cdn.shopify.com/s/files/1/0428/7548/6367/files/89500767049.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/ronco_e_apneia_do_sono.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/gabezasibipiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/0731/9965/files/15588271973.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/berewukijevekaluletene.pdf
    • https://cdn.shopify.com/s/files/1/0451/1108/3160/files/advancing_vocabulary_skills_4th_edition_answer_key_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/beer_brewing_books.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_off000044ce.bin
ed0ecfe964b045746bbb10b554a66783b32008b5f32c8f44540ace35d13b9032
pdf-font-stream PDF embedded font (sfnt) at offset 0x44CE 8792 bytes
font_01_sfnt_off00006200.bin
d83609ea73e7c9b23eab8b5ccc5a07c04edc7d3943fca9edc517969d72ca5e75
pdf-font-stream PDF embedded font (sfnt) at offset 0x6200 5152 bytes
font_02_sfnt_off00007386.bin
e7eaf6ed110152c01acd5e6cb8f245c87378e9b7fe4cc21fe654c15c3fa85b1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7386 9712 bytes