Malicious PDF — malware analysis report

Static analysis result for SHA-256 314caceee6b34e3f…

MALICIOUS

PDF

39.9 KB Created: 2020-08-30 06:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da6577aa32497997356de9f70e5ad458 SHA-1: 18de498e11a2f6c28f14c5fc6a47389bf41d6375 SHA-256: 314caceee6b34e3fa6c45419ae7e8d6211d79d06dd9908ebf3a0020b2446bf32
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.link, which is disguised with a 'uf real estate society' keyword. The document also contains a large number of embedded links, many pointing to cdn.shopify.com, likely part of a link farm to improve SEO for malicious content. The ML classifier strongly indicated maliciousness, and the PDF structure itself suggests a malicious redirector pattern.

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.link/wix?keyword=uf+real+estate+society
    • https://static.usrfiles.com/ugd/067ecb_aa7a9439ebdf43ac9701a543350f8766.pdf
    • https://static.usrfiles.com/ugd/bfbc46_3b0420763d254cf589407d8a978671e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_e361f78b2b334e9f896c843e33f55519.pdf
    • https://static.usrfiles.com/ugd/b8c837_22a61ac8063440f0b6ac9a509f4e206d.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b6596033ebe41459a3f3a90c3985e06.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7916/files/how_to_craft_sea_lanterns.pdf
    • https://cdn.shopify.com/s/files/1/0432/0015/1707/files/78232541039.pdf
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/foxofazadanuwumozigigovo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/betenowarebazubaraweg.pdf
    • https://cdn.shopify.com/s/files/1/0431/8055/6452/files/sajeti.pdf
    • https://cdn.shopify.com/s/files/1/0465/0011/8680/files/vazokebopudusivizi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6350/1222/files/mangastream_is_gone.pdf
    • https://cdn.shopify.com/s/files/1/0461/9282/0382/files/triple_frontier_parents_guide_2019.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_off00005de2.bin
a04a71c40ef0dac61d1d16244a7ddd5cbaf03c38187374a7393d8ab94f72e332
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE2 4968 bytes
font_01_sfnt_off00006eda.bin
4e7e698000dfcb58baf78b4f50ed46e1530321aee5e6653033d3c53267681df6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDA 10612 bytes