Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae841f52944970be…

MALICIOUS

PDF

44.9 KB Created: 2020-08-30 18:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46726b21633dd3c75cebe1f715a7dc0f SHA-1: b88834eff87dec503176d3a8559cae0f66738cf7 SHA-256: ae841f52944970bea368e06a16dc22ec479a87be687bdafe8ae339af39800b9f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious due to a high number of embedded external links. One critical heuristic firing indicates a PDF link to known malicious redirector infrastructure, specifically `https://ttraff.com/wix?keyword=counter+strike+textures+gmod`. Another critical heuristic identified a PDF link farm, with `https://static.usrfiles.com/ugd/b8c837_0bac334638874eb7886b943bbae14768.pdf` being the first URL in this farm. The document body contains garbled text but includes the same malicious URL, suggesting a lure or redirection attempt.

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/wix?keyword=counter+strike+textures+gmod
    • https://static.usrfiles.com/ugd/b8c837_0bac334638874eb7886b943bbae14768.pdf
    • https://static.usrfiles.com/ugd/b8c837_667dfbe41eec4e3195ef6593cafb208b.pdf
    • https://static.usrfiles.com/ugd/5cf23b_757dd737758544d0959b1ca0a0ad604b.pdf
    • https://cdn.shopify.com/s/files/1/0434/3060/9063/files/social_psychology_myers_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6566/files/76118681941.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/acls_asystole_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0437/4301/9157/files/danezafedefexidopi.pdf
    • https://cdn.shopify.com/s/files/1/0438/8998/3640/files/41370802878.pdf
    • https://cdn.shopify.com/s/files/1/0440/2076/0734/files/54769934069.pdf
    • https://cdn.shopify.com/s/files/1/0438/1789/4050/files/23348369473.pdf
    • https://cdn.shopify.com/s/files/1/0465/7581/2775/files/mizevewuvozinetivisatigid.pdf
    • https://cdn.shopify.com/s/files/1/0433/9345/0134/files/tibobozubedarewerovan.pdf
    • https://static.usrfiles.com/ugd/33a2e4_af7d04a2cda4432db3ce41edc504a8f0.pdf
    • https://static.usrfiles.com/ugd/ae059d_77d2e43d84254ea983b77cc11876334f.pdf
    • https://static.usrfiles.com/ugd/e3ff21_e11dea2e3b724414bb2f2bbe936350bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_c35bd179ac7a4036a742c1aa8f7f46b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_e03b998dd02543e581a86a6f2010f241.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/
    • https://cdn.shopify.com/s/file

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006830.bin
d0c7eb9b2c7d992e04dd4450cff128b93dda6ec7208e7bfc9a8c31053453c022
pdf-font-stream PDF embedded font (sfnt) at offset 0x6830 4940 bytes
font_01_sfnt_off000078e2.bin
6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x78E2 1800 bytes
font_02_sfnt_off00008172.bin
acf6a609ccc854f3722ad10d9e115b6e9842105fc3bcd27831937fbd8cb2282d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8172 10624 bytes