Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c920636b3766a8e…

MALICIOUS

PDF

62.4 KB Created: 2020-08-10 06:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8324d39aee82ab837d40c87dec49313 SHA-1: 5da9a861c50a8c5d1ac9db2191624dbc951202ea SHA-256: 9c920636b3766a8e31f7b247cb8d13c403f59f7e783d947688534af4e3ac8efa
150 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=what+is+bearing+capacity+of+soil+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'bearing capacity of soil pdf' and the URL itself, suggesting a lure to disguise malicious redirection. The PDF structure and embedded links are indicative of a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=what+is+bearing+capacity+of+soil+pdf
    • http://files.josephmace.com/uploads/1/3/1/8/131856170/vafawi.pdf
    • http://files.mjmoments.com.au/uploads/1/3/1/3/131383384/soxamew_mikiputejebirub.pdf
    • http://files.chrismayne.ca/uploads/1/3/1/8/131871494/4020624.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/44476317593.pdf
    • https://cdn.shopify.com/s/files/1/0431/5788/0994/files/digestive_system_organs_and_their_functions.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/mawiji.pdf
    • https://cdn.shopify.com/s/files/1/0440/4235/4853/files/zekid.pdf
    • https://cdn.shopify.com/s/files/1/0432/4543/7083/files/90535571675.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/ketowigedekelupex.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/48430369915.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/govasuzemuwipexi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0300/files/nuwireniregamom.pdf
    • https://cdn.shopify.com/s/files/1/0436/6431/0425/files/7895424094.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_off0000a827.bin
1cce3d0ec336f98b322efac579c250dbeb7234c6268acb686c7521235e8d35f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA827 5672 bytes
font_01_sfnt_off0000bb85.bin
12eb537741798c732969ddeeb3a034ee856fdf8af4af35de44e295ea114119c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB85 16004 bytes

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