Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c722c07c96656f5…

MALICIOUS

PDF

47.7 KB Created: 2020-09-08 02:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01aef61afde95028b2d374012e0ccd00 SHA-1: d2b40f333c603b2f16c7f11f53dac004f6110f11 SHA-256: 1c722c07c96656f557350de22fe2da9d948668f5850b1aa94cbe9be9e6f63018
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/pify?keyword=blob+as+file+javascript'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on 'static.usrfiles.com'. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the same malicious URL, suggesting an attempt to lure the user to a malicious site.

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.me/pify?keyword=blob+as+file+javascript
    • https://static.usrfiles.com/ugd/67e251_680e3b003f6a4c74b217df64e4ea587f.pdf
    • https://static.usrfiles.com/ugd/b8c837_66c3b32e43b14a329f38f6bb90c72a2d.pdf
    • https://static.usrfiles.com/ugd/affb4a_945ef587f22242efa78a242ccfe4b9cd.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_a916ffe39df24e3aaf9aece7bba87a4d.pdf
    • https://static.usrfiles.com/ugd/2b25b5_56fcbcd3ce644a9bbc27d76380876eae.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_3b2b7c9c273f474d91738016f246f325.pdf
    • https://static.usrfiles.com/ugd/d5cf39_a713bc5ba920468c8730369fe46a40f2.pdf
    • https://static.usrfiles.com/ugd/338562_f307719e7ee34a888e76f65c1c5ff3bc.pdf
    • https://static.usrfiles.com/ugd/3e5d97_6c0626d6581c4904be0712396562847f.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2ffbb510d6047d29d776de5440fe08b.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/fopuxamububori.pdf
    • https://cdn.shopify.com/s/files/1/0435/0712/2342/files/49243259130.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4457/files/free_online_hidden_objects_games_no_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/kenmore_stove_manual_troubleshooting.pdf
    • https://cdn.shopify.com/s/files/1/0436/0326/3645/files/ketamawibemopasimeke.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/raneposolovizavizinu.pdf
    • https://cdn.shopify.com/s/files/1/0465/3308/3294/files/fidutegetasagixovenovit.pdf
    • https://cdn.shopify.com/s/files/1/0454/0645/3928/files/nonoluvetixafow.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_off00007008.bin
8bc310c1b15a2aee45226464c0fac5510694a558ef6e724c17c80bb5fa44490a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7008 5016 bytes
font_01_sfnt_off0000812d.bin
592082ba4f400ea75c2ab8dc15cd0c7505aed6f078dfd2f4d2525343cd75bbef
pdf-font-stream PDF embedded font (sfnt) at offset 0x812D 10128 bytes
font_02_sfnt_off0000a3d5.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3D5 4324 bytes