Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb48f24aa2590714…

MALICIOUS

PDF

48.3 KB Created: 2020-08-01 02:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 834123d8383c67af8ce6a504fafb3826 SHA-1: 0d9510552d2a212cf0afcba87ead41c39bfa506e SHA-256: bb48f24aa25907144683287777517a043d312fbf516037d59564ac9aa5eecfff
120 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', which is used to lure users with a topic like 'how to format discord text'. It also contains a PDF link farm heuristic, indicating a large number of outbound links, many of which point to Shopify domains. The document body is heavily obfuscated but contains the same redirector URL. The primary attack vector appears to be a malicious link embedded within the PDF.

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.ru/pify?keyword=how+to+format+discord+text
    • http://files.bobdyerspeaks.com/uploads/1/3/1/3/131384185/borifewazepul_wedisemo_taloxoki_jedajomowug.pdf
    • http://files.judithahopkins.com/uploads/1/3/2/7/132741045/8e5701d8a790.pdf
    • http://files.ashleymartinportfolio.com/uploads/1/3/0/8/130814339/jimimobodupuxora.pdf
    • https://cdn.shopify.com/s/files/1/0434/7795/8822/files/15099265928.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/93674642944.pdf
    • https://cdn.shopify.com/s/files/1/0438/5862/4672/files/rinojotevirege.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2191/files/pewomewuziperolaga.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/14777031166.pdf
    • https://cdn.shopify.com/s/files/1/0429/1044/9830/files/93885471712.pdf
    • https://cdn.shopify.com/s/files/1/0433/3876/0342/files/dusapuxupozegipux.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2634/files/69778206486.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/mavevadu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/68744594478.pdf
    • https://cdn.shopify.com/s/files/1/0434/3798/1852/files/93568807836.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/c9_sneaky_op._gg.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/86877204005.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_off00006c42.bin
128cb230f3a561a81c6ecdf08a0042acd817bf588d4e2ee126cd3eebf2987526
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C42 4940 bytes
font_01_sfnt_off00007d17.bin
c7a4beda42ca5f4866c7aa869b035ac2a6046f110fe27a3e80c9bbb84bc53948
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D17 12772 bytes
font_02_sfnt_off0000a5b7.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5B7 4324 bytes