Malicious PDF — malware analysis report

Static analysis result for SHA-256 53685a9736c742df…

MALICIOUS

PDF

36.5 KB Created: 2020-08-01 05:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 731d0b5c8eca0831139ee8b64b954155 SHA-1: f85a34990df4f6916d0dbdddef32c0be67bd28de SHA-256: 53685a9736c742df8d9b26a354d6ba44d5a28e895b279b48f4587c9032476fad
120 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, with a critical heuristic firing indicating a link farm and a malicious redirector. The primary malicious URL identified is ttraff.ru, which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to the malicious URL and other external PDF links hosted on platforms like Shopify and custom domains. No scripts were extracted from this sample.

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=production+and+operations+analysis+solution+manual+pdf
    • http://files.affordabletax4you.com/uploads/1/3/1/3/131378780/9736676.pdf
    • http://files.jlaviary.com/uploads/1/3/0/8/130813876/7245716.pdf
    • http://files.emmanoelleclark.com/uploads/1/3/0/9/130969545/nepevusefotupawevex.pdf
    • http://files.anfdesigneddomains.com/uploads/1/3/1/3/131398221/72f6ee875e.pdf
    • http://files.saranyawellness.com/uploads/1/3/0/7/130775551/vuramate.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8106/files/hack_someones_snapchat.pdf
    • https://cdn.shopify.com/s/files/1/0430/4951/7205/files/samsung_sm_g900a.pdf
    • https://cdn.shopify.com/s/files/1/0438/4836/8288/files/fijivamikojogevogekokati.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/amazon_redeem_gift.pdf
    • https://cdn.shopify.com/s/files/1/0427/8878/2236/files/95203795936.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8095/files/63628091480.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/bilopebare.pdf
    • https://cdn.shopify.com/s/files/1/0432/6257/4750/files/nezesenopesigijimajob.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/11043515311.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/5818178536.pdf
    • https://cdn.shopify.com/s/files/1/0432/6529/4504/files/46967526720.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/trapping_rain_water.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vixegenosevisime.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_off00004f2c.bin
e1f3bbfed2dc2e995b142c37c339603ca5eeb9ea3b17b38c2b7e802338ed6734
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F2C 5404 bytes
font_01_sfnt_off00006182.bin
22c8480f10c8bd5e3647467aa479be3c95d12222a643af33ba3712bba87dc69b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6182 10192 bytes