Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ca18efdab3d950…

MALICIOUS

PDF

35.8 KB Created: 2020-08-12 17:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 726169013df515d98a97cd1dc96e2147 SHA-1: 293dd065ae8f2b55c6518f50d8380c78bf040a94 SHA-256: 48ca18efdab3d950bdcfd50c78e9329cd15603e3c44a5aef61d0c5b9bab5148d
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a 'Carestation 650 service manual' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF also contains a large number of embedded links, many hosted on 'cdn.shopify.com', which is flagged as a link farm. The primary malicious IOC is the ttraff.com URL, which likely leads to further malicious activity.

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=carestation%20650%20service%20manual
    • http://files.someday-l.com/uploads/1/3/0/8/130814157/nelav.pdf
    • http://files.baileytheatre.com/uploads/1/3/1/3/131380440/2dd9c68d7c8.pdf
    • http://files.hrpsychologyandcoaching.com/uploads/1/3/1/4/131453215/pusun-kewisuwuv.pdf
    • http://files.dalegarellphotography.com/uploads/1/3/0/9/130969724/871e58.pdf
    • http://files.drtaoka.com/uploads/1/3/2/7/132712206/zimiloze-biwororaj-xonujewiwi-tusaku.pdf
    • https://cdn.shopify.com/s/files/1/0451/1150/9145/files/add_text_to_adobe_reader_x.pdf
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/artritis_reumatoide_criterios.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9303/files/navafukobamerevataj.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8242/files/72680449336.pdf
    • https://cdn.shopify.com/s/files/1/0447/5761/4741/files/bise_lahore_matric_result_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muxajuvorupi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2613/files/gufatavinujaximaduke.pdf
    • https://cdn.shopify.com/s/files/1/0432/2705/4237/files/74898142515.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/mawifuroxebemaromo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/differential_amplifier_transistor.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6491/files/quimica_peter_atkins.pdf
    • https://cdn.shopify.com/s/files/1/0428/9658/8967/files/pexakogezajakexe.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_off00004dde.bin
a2d70752c147c5efe51d150372ab5f1d24a3005719bd697edbf4fde8dfed90b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DDE 5328 bytes
font_01_sfnt_off00005ff3.bin
28eab0374082701960d6ec5a0a5056b6b9d14ef2cb87a9bddd050fc2823562b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF3 10136 bytes