Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a8805e86c17e87b…

MALICIOUS

PDF

41.0 KB Created: 2020-09-17 18:39:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87a987687f9aef230121522859f55d38 SHA-1: 6a0f08e6b77e30560cfca4c845ebd2b1fad86323 SHA-256: 3a8805e86c17e87b54984bfdeb4f5bbbc0e0d0df4c02c3189ec85f68d32320b8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. The document body, though heavily obfuscated, contains the same URL and references a download for 'School 2017 ep 2 eng sub', indicating a lure. Additionally, a PDF link farm heuristic was triggered, with multiple links to Shopify-hosted PDFs, suggesting a broader campaign to distribute malicious content. The primary malicious IOC is the redirector URL.

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.club/wix?keyword=school+2017+ep+2+eng+sub+download
    • http://vemib.cdjff.org/uploads/1/3/2/8/132814930/1a1f3b79771.pdf
    • http://kodafoful.elportalschoolptg.com/uploads/1/3/1/6/131606666/3302135.pdf
    • http://gapoto.redwood4h.org/uploads/1/3/0/9/130969525/nanuva_xofol_zurobuxelupete_jodidabitito.pdf
    • http://sibakozas.emilytiberio.com/uploads/1/3/0/8/130814328/bomiwaku-ravemiboworumax-nolejezokonuz.pdf
    • http://suvovame.naturalhealthclinicni.com/uploads/1/3/1/4/131483067/betekem_wajufiwukaduti.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2791/files/australian_visa_subclass_600.pdf
    • https://cdn.shopify.com/s/files/1/0440/3268/8293/files/gta_4_cheat_keyboard_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/4769090923.pdf
    • https://cdn.shopify.com/s/files/1/0433/5455/4533/files/que_es_la_albumina_de_huevo.pdf
    • https://cdn.shopify.com/s/files/1/0462/3843/3429/files/xirefofanepikevun.pdf
    • https://b6be57da-225b-464c-afaa-0b41eb7f1957.filesusr.com/ugd/136d3d_f6e81f716462404a8dd58ee3facad347.pdf?index=true
    • https://423431a6-4a33-4ef9-9fad-2d15003f254c.filesusr.com/ugd/abd6ea_e1c617c5bf9e4e62a783ea1a57c589e3.pdf?index=true
    • https://7eedaa87-c12a-40a1-8412-2501d0449535.filesusr.com/ugd/02631b_aa5dd933db8c41eaac74465c3e72de82.pdf?index=true
    • https://d1176cc5-e45f-49cc-bfcd-58ab16864ad7.filesusr.com/ugd/3254bf_4fdcb9faab4b450d8faa9652ec42fb3b.pdf?index=true
    • https://d32bd628-ee14-469a-aa40-4fbb7f78e665.filesusr.com/ugd/e745be_1d58b85717814b19a4102a71fae0cb09.pdf?index=true
    • 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_off0000545c.bin
5a8f7ce9ebeaf0900c8c15bbaf43cbb83bc6d79f52337e2234af6b253ee6515f
pdf-font-stream PDF embedded font (sfnt) at offset 0x545C 3128 bytes
font_01_sfnt_off00005f98.bin
5f9a838f9d32361710339cd33d378f235789d172d8bca388918c0169c8e6f966
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F98 5980 bytes
font_02_sfnt_off00007407.bin
c5dd16d138d92d2934973a0e5c766408bbdaf6fbcbba7292e5f9d6496025fb86
pdf-font-stream PDF embedded font (sfnt) at offset 0x7407 10008 bytes