Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d1fc35373ba82c…

MALICIOUS

PDF

46.7 KB Created: 2020-08-27 19:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1d9dc4e4f3ce1a721e7681b7c3b6d3b SHA-1: 1ce0e0721c99b98fbea75ad25586e3ffb10ec2e3 SHA-256: 99d1fc35373ba82cbd38cb4cd8db5958f88c2ff6adc475dea84629f6f4c174c6
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links, many hosted on Shopify, suggesting an attempt to distribute or redirect users to malicious content. The presence of a visual download button further supports a lure-based attack.

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=siartec+en+linea
    • http://files.celiacstrongcamp.org/uploads/1/3/1/1/131163540/2454579.pdf
    • http://files.sueanderson.org/uploads/1/3/0/7/130739238/jomazejed.pdf
    • http://rimaroped.mykelpie.cz/uploads/1/3/1/6/131606490/68ea63c63dba2d.pdf
    • http://files.atelierbe.com/uploads/1/3/1/4/131453484/tugusevowijev-munabadebe.pdf
    • https://cdn.shopify.com/s/files/1/0437/2119/5688/files/sesopite.pdf
    • https://cdn.shopify.com/s/files/1/0430/7851/6885/files/super_smash_flash_2_v0._9b.pdf
    • https://cdn.shopify.com/s/files/1/0435/5702/8001/files/vizotixuzilovijabedivok.pdf
    • https://cdn.shopify.com/s/files/1/0432/8020/3944/files/toefl_reading_comprehension_passages.pdf
    • https://cdn.shopify.com/s/files/1/0427/4274/3207/files/zufus.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/juvizavi.pdf
    • https://cdn.shopify.com/s/files/1/0454/7146/5624/files/srimad_bhagavatam_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0431/6148/5471/files/xorunodolew.pdf
    • https://cdn.shopify.com/s/files/1/0435/9805/3539/files/maria_montessori_books.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/wabiraturisubalofaxodikod.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/91507559392.pdf
    • https://cdn.shopify.com/s/files/1/0438/9529/2059/files/milk_and_honey_full_book.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_off00006b85.bin
fbb6b4b5f3f3ea813a589ad2d6c1c2687b0930678f3cfa1ba74fc62f085998de
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B85 4396 bytes
font_01_sfnt_off00007a64.bin
241e66b84907c337f49dc13f56bdf52c269a9edbebc4e837662eb0c7fec71d6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A64 11188 bytes
font_02_sfnt_off00009fd8.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FD8 4324 bytes