Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc67ba573b060341…

MALICIOUS

PDF

34.4 KB Created: 2020-08-30 10:37:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30c6ed666f2315d03d8b88edc030c5bc SHA-1: f87c8ae46813ea499c0ff24902eae597a89254bd SHA-256: dc67ba573b0603418f186ddc434c2d3c1d1f3fb46efa56d27a0c37779498d78f
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.com/wix?keyword=philosophy+the+power+of+ideas+9th+edition', points to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be luring users to malicious sites via a deceptive document.

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=philosophy+the+power+of+ideas+9th+edition
    • https://static.usrfiles.com/ugd/affaa6_944c8e2dc658455abbe709bba293d1af.pdf
    • https://static.usrfiles.com/ugd/67f5f7_4ae15e593d294b58aa882ca767e1a162.pdf
    • https://static.usrfiles.com/ugd/b8c837_73d299d862fd4e2e9863d1280a5e008d.pdf
    • https://static.usrfiles.com/ugd/b8c837_356dc075a8df438885c06052ce8c0c88.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_7327fdb077f34660bc98bd024ba91ff0.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a0b90329eae4c639336662e90f90bb4.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_eb9c059d5fd442fba78498bd7fe47ebc.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_44d7837615dd481fb9e8772c33f9be66.pdf
    • https://static.usrfiles.com/ugd/432b07_6639d3a040e84761bd23beca7b78d6c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_882974bfd91d4483abc4bc256aa23e76.pdf
    • https://static.usrfiles.com/ugd/b8c837_1151f941a10c448694d147db5a53ce12.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6733015585.pdf
    • https://cdn.shopify.com/s/files/1/0435/3415/5928/files/94515932594.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/janekeni.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_off00004803.bin
ec5f4b17b7d793942ad8b8fb0a65cf0f0e4d1ace1ae0981e39cfd54238b13c4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4803 5480 bytes
font_01_sfnt_off00005aaa.bin
a42699a6913b402069a534b5afe8bc04e8467595fc26aabf18749e2a886c8f4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAA 9880 bytes