Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c76f8c9c0fd29df…

MALICIOUS

PDF

42.5 KB Created: 2020-08-23 08:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47407189278812db88102a5e7b415a69 SHA-1: d88bd82a6a8e9afc4fe9cf6ad9b03d6727ce9d23 SHA-256: 7c76f8c9c0fd29df246b9d19de3190c39ca26b03e1dedd654b577a3acab25b05
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=hand+embroidery+bed+sheet+work'. This indicates the document is designed to redirect users to malicious infrastructure. The presence of numerous other PDF links, many hosted on file-sharing services, suggests a link farm or SEO poisoning tactic to distribute the malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document body and a malicious URL.

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=hand+embroidery+bed+sheet+work
    • http://files.gptheatre.com/uploads/1/3/1/8/131857756/df10266198.pdf
    • http://files.northwoodshypnosis.com/uploads/1/3/0/9/130969489/5313983.pdf
    • http://files.kingstoned.org/uploads/1/3/1/6/131637896/bagok.pdf
    • http://files.riverroofingbend.com/uploads/1/3/1/8/131856306/9871859.pdf
    • http://files.growingthroughlosstcsouth.com/uploads/1/3/2/3/132302941/8282492.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1146/files/33530258789.pdf
    • https://cdn.shopify.com/s/files/1/0448/9995/8939/files/injustice_gods_among_us_hack_android_apk.pdf
    • https://cdn.shopify.com/s/files/1/0461/5412/1379/files/some_information_about_the_planets.pdf
    • https://cdn.shopify.com/s/files/1/0431/3671/2861/files/papyrus_of_ani_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9377/files/96781641490.pdf
    • https://cdn.shopify.com/s/files/1/0440/8446/1720/files/triangle_symbol_text.pdf
    • https://cdn.shopify.com/s/files/1/0431/6443/4583/files/giwope.pdf
    • https://cdn.shopify.com/s/files/1/0447/5571/4199/files/woxikofenanifiso.pdf
    • https://cdn.shopify.com/s/files/1/0433/7994/9718/files/23574890116.pdf
    • https://cdn.shopify.com/s/files/1/0441/3367/9256/files/baladivavelovigatogip.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_off00006955.bin
1d26d021502066a57ef1f5390e8fb9631e4a5d8a206f3b514bd9ac3611cc7da0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6955 5392 bytes
font_01_sfnt_off00007b88.bin
980715666cdf10ef08faf7faaec53bcdb9ccd7a3fc4bcfd4f1ce518763caa224		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B88 10000 bytes

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