Malicious PDF — malware analysis report

Static analysis result for SHA-256 2668e6eb05e50ac1…

MALICIOUS

PDF

46.6 KB Created: 2020-08-29 20:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bc3bc5c6a158542201c18e701d6e174 SHA-1: 0f9eaf72f8ad3601bf53ed6107a2ee48cac4b00b SHA-256: 2668e6eb05e50ac156b1ac3eb3a4d8ee006716924c5de14bf6b0238d2bff68e1
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The primary malicious URL is https://ttraff.cc/wix?keyword=biblia+peshitta+en+espa%25C3%25B1ol, which likely serves as a lure for phishing or malware delivery. The document body itself is heavily obfuscated and appears to contain corrupted text, but the presence of the malicious URL is the key indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=biblia+peshitta+en+espa%25C3%25B1ol
    • https://cdn.shopify.com/s/files/1/0437/6697/2577/files/calculus_and_its_applications_13th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/7244/6873/files/33626727111.pdf
    • https://cdn.shopify.com/s/files/1/0429/8414/5049/files/50077453454.pdf
    • https://cdn.shopify.com/s/files/1/0432/2898/7547/files/nokaf.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd134cce73ed48b3b14e5292415ba184.pdf
    • https://static.usrfiles.com/ugd/0a052f_6f9d06694e254ba4a939ebfa84d07039.pdf
    • https://static.usrfiles.com/ugd/b8c837_423da957b24945749e3364e832b5d02a.pdf
    • https://static.usrfiles.com/ugd/b8c837_305686cba2b1416ab26206ccd25b4f1a.pdf
    • https://static.usrfiles.com/ugd/4826f5_d6ae2c796fe9419c8bd4abb59917d23f.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f19f3f709c24505b265ac7d5dbada1b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef7d72377e1c40138326c3302fad502f.pdf
    • https://static.usrfiles.com/ugd/b58d21_d73e7128d3cf4516b51143260462b1f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc3593a299b44a2798f240f0b686a572.pdf
    • https://static.usrfiles.com/ugd/97634b_ceb4d90c20a947588bef3dc3819284b3.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_off000064b9.bin
617db27fa2d6370d8bccca4b1a23693871789d5fa6e4af3240ab563d8a76af57
pdf-font-stream PDF embedded font (sfnt) at offset 0x64B9 5212 bytes
font_01_sfnt_off0000761b.bin
0417a287ec153c87651af43a917b04bb86d36d48d83e98f8a564aa308bacc9fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x761B 11696 bytes
font_02_sfnt_off00009a7b.bin
bd4d580f7345c3f2aaa70d8ec71af8c158d4ee97c311146cde9fdda9449bcd00
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7B 6632 bytes