Malicious PDF — malware analysis report

Static analysis result for SHA-256 507d66d144e928e9…

MALICIOUS

PDF

44.6 KB Created: 2020-08-31 06:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 636674553be8247b36491adc178996d1 SHA-1: e07f5e0993801fe6cd8c1ae2e9a2eab156fe852c SHA-256: 507d66d144e928e96db7c73f22a4c565e12c48765be87293d51ae9f76a730f6c
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with 30 external PDF links detected. One of these links, https://ttraff.com/wix?keyword=table+de+loi+normale+centr%25C3%25A9e+r%25C3%25A9duite, is flagged as a known malicious redirector. The document body itself appears to be a garbled representation of 'Table de loi normale centrée réduite' along with metadata from wkhtmltopdf, suggesting it's not intended for direct user consumption but rather as a lure or a vehicle for link distribution. The primary attack pattern appears to be SEO manipulation or redirection to malicious sites via a link farm.

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=table+de+loi+normale+centr%25C3%25A9e+r%25C3%25A9duite
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/xozabixif.pdf
    • https://cdn.shopify.com/s/files/1/0429/4197/2636/files/13503442940.pdf
    • https://cdn.shopify.com/s/files/1/0433/7795/0881/files/60665425050.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/xugule.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xomekanob.pdf
    • https://static.usrfiles.com/ugd/b85eb0_b0c3c20b097843ac958b7ac4d3f330f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_c943bdc124c843179d3216b1687378f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_bda96b91e62445049cbdeb2cb1c3580d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d51958e1a64f4430911f6d52c8188b8d.pdf
    • https://static.usrfiles.com/ugd/b8c837_7dc2931988214758ae7ed0004285d4b9.pdf
    • https://cdn.shopify.com/s/files/1/0449/2571/4599/files/kurutotogakezijolufib.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/miwisebirazof.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/40904836539.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/electronics_and_communication_engineering_subjects_notes.pdf
    • https://cdn.shopify.com/s/files/1/0435/2537/4103/files/www._ethiopian_reporter_amharic_newspaper.pdf
    • https://cdn.shopify.com/s/files/1/0432/1860/0095/files/tecnologia_assistiva_fisioterapia.pdf
    • https://cdn.shopify.com/s/files/1/0428/0965/5462/files/charles_law_experiment_answers.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_off00005f3d.bin
8fe6720c3c37f9730e596959ebb63103c1a9d1a5139a8b1eff4a22b588beb3c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3D 5020 bytes
font_01_sfnt_off00006fe4.bin
50ed9a822b61274f6edc8cf233d721e33a1ef092977d84e3925cc149cd7ef5ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE4 11736 bytes
font_02_sfnt_off00009548.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9548 4324 bytes