Malicious PDF — malware analysis report

Static analysis result for SHA-256 4872b8328939d861…

MALICIOUS

PDF

43.1 KB Created: 2020-08-30 02:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c69ef50edc180546f25554d12a6c734 SHA-1: 705793c67897d8086c45aac54ee43edc2a9de67e SHA-256: 4872b8328939d861d5baa849a369dbb3b2e38b318a6d952440618310c9785878
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on shopify.com. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/wix?keyword=valley+of+the+kings+movie'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect users to malicious infrastructure. No scripts were extracted from this sample.

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=valley+of+the+kings+movie
    • https://cdn.shopify.com/s/files/1/0432/6653/9673/files/apigee_edge_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0438/0151/0045/files/17680702525.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/18831136703.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/sumiwipawigamalatonima.pdf
    • https://static.usrfiles.com/ugd/60933b_8e2ab33c04584c4ea63a5fb306cc961c.pdf
    • https://static.usrfiles.com/ugd/87a178_6e20d39669624041accb6b27dfcfb9f7.pdf
    • https://static.usrfiles.com/ugd/4f270c_9b29df7d84d541eaa90b58d1c8236058.pdf
    • https://static.usrfiles.com/ugd/405339_b3106722545348558d4b2d92f6968df0.pdf
    • https://static.usrfiles.com/ugd/b8c837_17210462a724451698488763164e7bf8.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_ef87200f1f8c4184b0c4415eeecc0c30.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_off000069ee.bin
cdea79aafc55dee84d9799d1379e34d48c2b65c8cd243fcced7b65e665020627		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69EE 5276 bytes
font_01_sfnt_off00007bd8.bin
a216d117d8c1ecbcb792ae08b5c5c347811beb4ff7af0760fd33bf0e8b76b0f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD8 10612 bytes

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