Malicious PDF — malware analysis report

Static analysis result for SHA-256 84894738741adae5…

MALICIOUS

PDF

39.9 KB Created: 2020-08-13 21:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03230d7a6fea375a75ebfa22689685e9 SHA-1: 358e6d977d2132b3c6f962d0955024e28e9c08a0 SHA-256: 84894738741adae52c8b60e67ad641f42ad24ee4a384c700461f7c6f2132f843
128 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic indicates a malicious redirector link to 'ttraff.ru' which is associated with the search term 'abbots langley school uniform'. The document body also contains this search term and a link to a Shopify-hosted PDF, indicating a lure to click on the malicious redirector.

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.ru/pify?keyword=abbots+langley+school+uniform
    • http://files.en.lflplatform.net/uploads/1/3/1/4/131409463/wizupofonaxa-nilipeboji.pdf
    • http://files.elainejaryart.com/uploads/1/3/1/0/131071315/mopumaditisotix_lizuxugepaz_zuligo_gixemelagus.pdf
    • http://files.drbobstem-ed.net/uploads/1/3/0/7/130776006/09bc8caf0.pdf
    • http://files.psykotherapist.com/uploads/1/3/0/7/130739542/mitirasekebokajada.pdf
    • https://cdn.shopify.com/s/files/1/0435/3540/1111/files/vce_to_free_online_tool.pdf
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/o_que_meio_ambiente.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1010/files/99710276121.pdf
    • https://cdn.shopify.com/s/files/1/0431/2019/7789/files/networking_devices_and_their_functions.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/muboxokiwugosa.pdf
    • https://cdn.shopify.com/s/files/1/0444/2020/2663/files/dictionary_of_synonyms.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/27192316602.pdf
    • https://cdn.shopify.com/s/files/1/0433/9705/4631/files/best_boss_gt_8_software_editor.pdf
    • https://cdn.shopify.com/s/files/1/0428/3092/1895/files/73487342157.pdf
    • https://cdn.shopify.com/s/files/1/0430/9303/3117/files/wopovobuwetorunagix.pdf
    • https://cdn.shopify.com/s/files/1/0428/8187/6131/files/86489665451.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_off00005a49.bin
a96113ecbbeb65842106695da1c66faf1305ce4d00564900c6e2e91479df4137
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A49 5524 bytes
font_01_sfnt_off00006ced.bin
5d5a85e7d56b751940e1502afe841d70de19eceb140f245cfeb86fd405ea07ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CED 10728 bytes