Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c3be0fa3c2c499…

MALICIOUS

PDF

62.2 KB Created: 2020-08-13 04:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e5b0904c631f5796baddfacb5c779ac SHA-1: 1574f6965d51b0f7be989104ffe72620a797d332 SHA-256: 36c3be0fa3c2c499f0585521cc57d3f79a5e74b408022c66b42f2f9b95fe1938
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link directs to a known malicious redirector at ttraff.cc. This indicates a social engineering attempt to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=paganini+cantabile+violin+pdf
    • http://daluvin.coteglace.com/uploads/1/3/1/4/131437792/cace2add66b.pdf
    • http://mavewezar.uknappynetwork.org/uploads/1/3/1/3/131383544/jadatorobolojuxut.pdf
    • http://wisem.menallenfriends.org/uploads/1/3/0/8/130874493/nanawu-fagutoxadufujon.pdf
    • http://files.denamarieandrews.com/uploads/1/3/1/3/131383533/5087622.pdf
    • https://cdn.shopify.com/s/files/1/0432/8793/7179/files/pidubiverogane.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/xovulitikibavowarumekal.pdf
    • https://cdn.shopify.com/s/files/1/0436/1335/6194/files/67757369384.pdf
    • https://cdn.shopify.com/s/files/1/0435/9215/5295/files/wivajerebusowudesis.pdf
    • https://cdn.shopify.com/s/files/1/0432/8108/8670/files/data_structure_and_algorithm_tutorial_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5058/1662/files/rofanubazazolosuleduwiwuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/composite_materials_by_kk_chawla.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/arm_microcontroller_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/sixth_grade_math_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0437/1428/1625/files/lupibazejigotuwul.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/bivizoturawoxujir.pdf
    • https://cdn.shopify.com/s/files/1/0440/0329/5382/files/incremental_backup_script_in_bash.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b5e.bin
ef5d2cb93637493fdf8ae8559fd6396dfc88d232a501de7c6682569daec906db
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5E 3364 bytes
font_01_sfnt_off00008763.bin
f5b9d69a2e6247daf2e53ec4304041401e91b0bad95722a6a2eb91f1ca654a29
pdf-font-stream PDF embedded font (sfnt) at offset 0x8763 5248 bytes
font_02_sfnt_off0000994e.bin
843c4ba404bf30f5d96c217dc8efdce699e725ae04b61e9b80e18e63d34c3573
pdf-font-stream PDF embedded font (sfnt) at offset 0x994E 11204 bytes
font_03_sfnt_off0000bc50.bin
1d929e9c8ebccf6b5a0c62eed989344393f30e951d54cf1a619b95372d1474ef
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC50 14920 bytes