Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5ce2b665cc5101…

MALICIOUS

PDF

39.4 KB Created: 2020-09-01 06:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f574c5f5f9338f0e1612c4b38647eb1d SHA-1: babf721f57dfc517cfc323fc4bf67f93f2ad7792 SHA-256: ee5ce2b665cc51019dce9933d95043b8bbeb7122126fcfdfbfb04c6ae3c54d77
152 Risk Score

Malware Insights

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

The PDF document contains a link farm and a direct link to a known malicious redirector, ttraff.cc. The document body text, though partially corrupted, includes the phrase "Grandpa and granny house escape apk" and the malicious URL, suggesting a lure to a potentially malicious download or game. 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.cc/wix?keyword=grandpa+and+granny+house+escape++apk
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/spyro_reignited_trilogy_soundtrack.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/61511998955.pdf
    • https://cdn.shopify.com/s/files/1/0429/7234/8579/files/79545565970.pdf
    • https://cdn.shopify.com/s/files/1/0429/4030/1478/files/vogunamagafuwal.pdf
    • https://cdn.shopify.com/s/files/1/0463/2448/2208/files/oxford_school_thesaurus.pdf
    • https://cdn.shopify.com/s/files/1/0439/6023/8238/files/88870693512.pdf
    • https://cdn.shopify.com/s/files/1/0430/0154/4863/files/16291497523.pdf
    • https://static.usrfiles.com/ugd/b5aed9_8bab3e903d3f4dfa871a37caafe345d2.pdf
    • https://static.usrfiles.com/ugd/99afdc_0ce7a1a8ea0d451fba142a420d4d41fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0da1d4032d04b75bf8ad127122a9d82.pdf
    • https://static.usrfiles.com/ugd/314c35_8b66e11166474d518803a2afd6c7380e.pdf
    • https://static.usrfiles.com/ugd/b8c837_9756cd132ce34c6e8b7e9d053dcd4348.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad69518613604b57992494a838919344.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_off00005c43.bin
705d97bc7b9a8215c4bbc78413983445395546a79799d634568e96ff69697b76
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C43 5500 bytes
font_01_sfnt_off00006f02.bin
040bd017445a23c80aaf975396180d765c91f3da0210b5d1dcd7b6a0dd233336
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F02 10016 bytes