Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd7b2f30d290b7e…

MALICIOUS

PDF

35.1 KB Created: 2020-08-29 01:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2bfd40cd7e950f5d32b9ed7681e2f92 SHA-1: b32e818a1e892de200adcd7819e6e5ce528587f1 SHA-256: fdd7b2f30d290b7ecd3d1424ebc6d24ccf2f6137c79684f0857e7ae456e15f07
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm, with numerous external PDF links, many hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking URLs, suggesting a lure or distribution mechanism. The primary intent appears to be directing users to malicious infrastructure or a large collection of linked documents.

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=libro+disciplina+con+amor
    • https://static.usrfiles.com/ugd/b8c837_5abee67d93264a0a8fa8ec8f88a3df11.pdf
    • https://static.usrfiles.com/ugd/b8c837_358530d5d96745719cec97db95ba54e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cbcdd66fa46440fabbe87efdfb1d3b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_681f2cc7fc5c4ddc8bff164975e67588.pdf
    • https://static.usrfiles.com/ugd/b8c837_b19285778027454f8e8c2d6da5dcc2ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_41739e46bade405d8169c1762424a5e1.pdf
    • https://static.usrfiles.com/ugd/b8c837_5404fdac63b843aea2ad5f52b0b64019.pdf
    • https://cdn.shopify.com/s/files/1/0433/9564/5589/files/devadawujogujofejax.pdf
    • https://cdn.shopify.com/s/files/1/0430/7625/5897/files/tuminuteniboxakege.pdf
    • https://cdn.shopify.com/s/files/1/0434/3706/4344/files/97775520975.pdf
    • https://static.usrfiles.com/ugd/b8c837_80c09b72ba0a440abe4c978e1794a1c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_713cf3315c39486a8fafe1f340c7bd80.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ee64cc5bdc248c58947aa9b94236728.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047de.bin
4534ff8ec5ba97dc351a424e7cbe78f1526d4d9849fafd0b882c0da385b7cdea
pdf-font-stream PDF embedded font (sfnt) at offset 0x47DE 5300 bytes
font_01_sfnt_off000059bd.bin
245c6cc022b5fae82d5c3f0a8dc28c29ac86c8a1038ce8e950d75185dd76768c
pdf-font-stream PDF embedded font (sfnt) at offset 0x59BD 11276 bytes