Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7947522c836d82…

MALICIOUS

PDF

39.5 KB Created: 2020-09-01 18:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c966a6ce9e5d2b7d00d3972a46b32ee5 SHA-1: 200d67dc1f639aa92a7cc23803a994dacd3128cd SHA-256: be7947522c836d822dcb06b53a968f06c185843506f33c89a8057f26a8e931bd
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body text appears to be corrupted or malformed, but the presence of the malicious URL and the link farm heuristic suggest the primary intent is to lure users to malicious sites.

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=using+commas+practice+worksheet+two+answers
    • https://static.usrfiles.com/ugd/b8c837_a8bcaeab14304356a670b1c59d01268e.pdf
    • https://static.usrfiles.com/ugd/3e5d97_77160923591e47d780bc82c5dd5b0f9f.pdf
    • https://static.usrfiles.com/ugd/1be480_49956c845773415aacb0c9972f406d4f.pdf
    • https://static.usrfiles.com/ugd/99afdc_a972640d895e4091b81c171d382b6424.pdf
    • https://static.usrfiles.com/ugd/b444d4_fbea284594004989b21b0612d828a9cd.pdf
    • https://cdn.shopify.com/s/files/1/0434/1940/2405/files/manodazefetiruweg.pdf
    • https://static.usrfiles.com/ugd/b8c837_1816ed7f36b240ccacc5e447da034b88.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec8fa0036ef7465ea804f506bcd2eca4.pdf
    • https://static.usrfiles.com/ugd/6a7407_23781537774b4140b90e3391073dd232.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ca733eb7ac848cf887eb8202189f8c1.pdf
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/vatotoxorij.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/jilivo.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_off00005c94.bin
7461ac460d766badd69e754b8cc9e8ab3817553093dce2dd85242b815d6be594		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C94 5464 bytes
font_01_sfnt_off00006f18.bin
ee896573c766e4f415565cd9ef228573da9dd75dc4608788d494ec20abefd619		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F18 10140 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.