Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc3533842736fb6e…

MALICIOUS

PDF

53.4 KB Created: 2020-08-05 08:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3e5d7db980dffc61b930405bda8c1e0 SHA-1: 10289be13b0e568541ea1f4cc0d750cdac2499e0 SHA-256: fc3533842736fb6e0a61d148e0883d06a27f97c2ac737240b8fc83dc2b030a5b
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a language learning resource. This indicates a phishing or social engineering attempt to direct users to malicious infrastructure. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=belajar+bahasa+inggris+pdf
    • http://tawubi.polarbands.com/uploads/1/3/1/4/131453194/majig-jopapepavala.pdf
    • http://files.colinjlmccartney.com/uploads/1/3/1/4/131437926/3dbbedf2a6e6.pdf
    • http://files.annemariewalter.eu/uploads/1/3/1/3/131379540/zaber.pdf
    • http://jigimulez.realmsquestlarp.ca/uploads/1/3/1/4/131453494/reteluk_sewapoxikovur.pdf
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/graco_pack_n_play_instruction_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/5660369355.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7912/files/56765476433.pdf
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/9519337759.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0201/files/25367906245.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5556/files/79679792134.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/vimizilopepimuvokulekam.pdf
    • https://cdn.shopify.com/s/files/1/0438/5167/7856/files/wanika.pdf
    • https://cdn.shopify.com/s/files/1/0428/1729/0407/files/85980966047.pdf
    • https://cdn.shopify.com/s/files/1/0432/7328/9894/files/aceptacin_positiva_incondicional.pdf
    • https://cdn.shopify.com/s/files/1/0434/5724/9430/files/soluvurejevajivo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3904/files/medical_microbiology_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/0379/5865/files/solavadopuv.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_off000086b5.bin
67d641eb2fe47ee709a20c6a6d8a400688435dff2599c6a2bf4cf3c461ba1286
pdf-font-stream PDF embedded font (sfnt) at offset 0x86B5 5164 bytes
font_01_sfnt_off00009829.bin
5c614c890fe126aca224d4ac1e50be333e21bc0e7fc3bd6c4d5b6dbaf00328a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9829 10024 bytes
font_02_sfnt_off0000ba73.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA73 4324 bytes