Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7770d6f0ccd576f…

MALICIOUS

PDF

49.1 KB Created: 2020-08-31 06:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc02135beef64f86c9f3e10c4e5d94a3 SHA-1: 5f59329212e5df464d08ad86b15fbb6f458bc960 SHA-256: d7770d6f0ccd576fad412c9660f36b773f56ceba3df0bda99ae6a00ddf70e513
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to the malicious redirector ttraff.com, which is designed to lure users to further malicious content. The document body text and embedded links suggest a social engineering tactic to trick users into clicking malicious URLs, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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.com/wix?keyword=ace+hood+bugatti+remix+mp3+download
    • https://static.usrfiles.com/ugd/b8c837_4428a6865b444c5a8e2229b284c24979.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b6c745be44b4880b4906a0e94e2621d.pdf
    • https://static.usrfiles.com/ugd/7f46b5_c9ec80212c394c5e8c94c20ae67b1255.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2e58e398be845f0a68eaf279256ff45.pdf
    • https://cdn.shopify.com/s/files/1/0428/9586/8067/files/kedaruxegugabutaroliz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7228/3033/files/carbohydrates_digestion_in_ruminants.pdf
    • https://cdn.shopify.com/s/files/1/0428/1463/6198/files/zutitolepodurarof.pdf
    • https://static.usrfiles.com/ugd/b8c837_90cbdfe5e4e44502bfc36b782c597e03.pdf
    • https://static.usrfiles.com/ugd/430cb2_5214d0e7bd0c4e5e8aab7fa46cae5ef0.pdf
    • https://cdn.shopify.com/s/files/1/0439/4529/6027/files/48463773753.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1460/files/32837789289.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_off00005e70.bin
65bd985ffe27f2871f9a3e13aa18d524f2d814a0f2e495662911d600b660d794
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E70 5760 bytes
font_01_sfnt_off000071fc.bin
8088af57cf9a94cb3f8ba71792f470675e43305c64f1ddf327ab840d87313d23
pdf-font-stream PDF embedded font (sfnt) at offset 0x71FC 11864 bytes
font_02_sfnt_off00009818.bin
e58e8e8d3617fa2f52d62469859eb662c26c1c1537dc21f5cc6f1aa71eaa6aed
pdf-font-stream PDF embedded font (sfnt) at offset 0x9818 18776 bytes