Malicious PDF — malware analysis report

Static analysis result for SHA-256 b29aa7657d6f7583…

MALICIOUS

PDF

42.9 KB Created: 2020-08-30 13:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efd5441b8387301d95c0585cc8cff3f1 SHA-1: 4db2d5188e6b7425e10c735faed599de8f051372 SHA-256: b29aa7657d6f7583317d6c4d2fd084250347c385bf27a06f1acae4c08ba44a25
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a known malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a mass external PDF link farm, suggesting a broad distribution attempt. The ML classifier also strongly flagged this PDF as malicious. The primary malicious URL identified is https://ttraff.com/wix?keyword=gottlieb+fast+draw+Flipper, which is likely used to redirect users to a malicious site.

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=gottlieb+fast+draw+Flipper
    • https://static.usrfiles.com/ugd/6908d7_b1b0fd6f2774490ab61c2571d9899f64.pdf
    • https://static.usrfiles.com/ugd/12dc78_b8494af96be4493dafc696ae3c904350.pdf
    • https://static.usrfiles.com/ugd/b8c837_9598cd4bcc004f8ebc6a8e483cf660ae.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/44821597712.pdf
    • https://cdn.shopify.com/s/files/1/0439/2475/0504/files/29537479431.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3215/files/56583897273.pdf
    • https://cdn.shopify.com/s/files/1/0432/7807/4022/files/play_minecraft_pocket_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0460/2570/3583/files/11274243979.pdf
    • https://cdn.shopify.com/s/files/1/0437/7234/6526/files/ladija.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/alloying_elements_in_steel_and_their_effects.pdf
    • https://static.usrfiles.com/ugd/b8c837_b060cc17e58c43a089529cbf2b9da602.pdf
    • https://static.usrfiles.com/ugd/9374a7_15fb7ccf93ab42e1b5c0e3b188ff6a2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_e04cfbe82eb043ddbcb5868b31569016.pdf
    • https://static.usrfiles.com/ugd/b8c837_7aefd942af7945398a92b6381d1191bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_b598d61539d341b69596c25235f27f7c.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_off000068cc.bin
5c1771dc327b147019d4954538e442f6baf5324f5fb18cfe76133f201e7c12a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x68CC 5348 bytes
font_01_sfnt_off00007b24.bin
5d8435afd82153a7e24f9557d784433016b6193b6c76857ded401572ba2d8499
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B24 10552 bytes