Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3cbef9bd103eb7…

MALICIOUS

PDF

43.5 KB Created: 2020-08-09 21:30:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0224cafaac39b735f81b2bc214b68a58 SHA-1: dd7705f543ff5878cdc3605e4124a693fd2d2097 SHA-256: 2b3cbef9bd103eb71102c023c1d15ab38102321ac34edcd1a332dc9eb9815d58
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at `ttraff.com`. The document body, though heavily obfuscated, contains text related to a 'Harry Potter acceptance letter template PDF' and includes the malicious URL, suggesting a lure. The presence of multiple PDF links, many pointing to `cdn.shopify.com` with seemingly random filenames, indicates a link farm or SEO poisoning attempt to drive traffic to the malicious redirector. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document and malicious links.

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=harry+potter+acceptance+letter+template+pdf
    • http://tubale.nowitmakestense.com/uploads/1/3/1/3/131380126/wunukesurufotim.pdf
    • http://zivexere.philipokeeffe.com/uploads/1/3/1/6/131607163/xutepob.pdf
    • http://files.saintalphonsusschool.org/uploads/1/3/1/8/131857071/b41fba5.pdf
    • https://cdn.shopify.com/s/files/1/0437/5108/0087/files/queen_bohemian_rhapsody_piano_solo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6369/6805/files/fibonujinamawot.pdf
    • https://cdn.shopify.com/s/files/1/0431/9854/6084/files/23759860606.pdf
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/kefivaluxerazazo.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/jebaji.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/85104404386.pdf
    • https://cdn.shopify.com/s/files/1/0429/7608/4117/files/65666610807.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7582/files/code_in_discord.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/7244589197.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/67278892571.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/fundamentals_of_python_first_programs_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/1254/6975/files/fozeridivawibibigeruz.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_off00005f87.bin
f633c54f2c1c75769914fc49efbafa5df41b14450146b1fe888f52e9d3cc1c8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F87 4928 bytes
font_01_sfnt_off00007037.bin
bc09a315c87c1a66e0fb6824c7231c7e2c4e5883cfbe66db0f27f6987327132f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7037 10128 bytes
font_02_sfnt_off000092db.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x92DB 4324 bytes