Malicious PDF — malware analysis report

Static analysis result for SHA-256 b50dd0a918469fed…

MALICIOUS

PDF

40.8 KB Created: 2020-08-08 06:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 605ab8e56bc87cc61398d30d4aad64b3 SHA-1: aca3948522e9e79c305c6e1d055e29545747da6a SHA-256: b50dd0a918469fedcc1be13d25c30b41862e0d8e9988765555297e9c6c8e168f
128 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a download for a "synonyms dictionary". This link redirects to `ttraff.com`, which is flagged as a malicious redirector. The document also exhibits characteristics of a link farm, with numerous embedded links pointing to PDFs hosted on various domains, including Shopify. This suggests a social engineering tactic to drive traffic to malicious sites.

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.com/pify?keyword=synonyms+dictionary+free+download+pdf
    • http://files.rabbitmountainlavender.com/uploads/1/3/1/0/131070072/gatuxalufof-sodakogixigabo-wisolatifomuziz.pdf
    • http://files.downingcpa.com/uploads/1/3/1/8/131856065/tobibavamujifas.pdf
    • http://files.bouvier.org/uploads/1/3/2/6/132682610/1fe8f4ac951c1.pdf
    • http://files.kaptive8photo.com/uploads/1/3/2/6/132681316/wimawejopati_kiwawiriretopun.pdf
    • http://files.disfrutaelmundo.com/uploads/1/3/1/4/131438501/189948.pdf
    • https://cdn.shopify.com/s/files/1/0437/2224/4246/files/al_dente_corso_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0432/6244/3683/files/mamobuxogepigekoxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4071/8496/files/99909259101.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4730/files/76792634609.pdf
    • https://cdn.shopify.com/s/files/1/0453/2423/9003/files/access_control_technologies.pdf
    • https://cdn.shopify.com/s/files/1/0432/8577/4502/files/airplane_crash_reports.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/12069616153.pdf
    • https://cdn.shopify.com/s/files/1/0437/6012/4061/files/rufiwonagefok.pdf
    • https://cdn.shopify.com/s/files/1/0434/4479/7607/files/ball_bearing_price_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4935/files/53999033774.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_off0000529f.bin
a4f7ba902df2180eccd97cb45dc481327cf4293d60ffdc6b1681238bc1390c9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x529F 5384 bytes
font_01_sfnt_off000064df.bin
6f730323767cc1bf971bf17b98bd9057e8e99131b0f155a1400234eaf0a76bb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x64DF 10308 bytes
font_02_sfnt_off000087bd.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x87BD 4324 bytes