Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13876898a5fddf4…

MALICIOUS

PDF

40.7 KB Created: 2020-08-04 10:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a2993975f104d4deec9dda91501ac05 SHA-1: 7bae9a1d9ebe8e640bc9fa3a9c7a213b8afb1a7d SHA-256: a13876898a5fddf4703ba27f178e4f4e0413b92f0e8ddc7b734e7b5d93fa54d4
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, which is indicative of a link farm or SEO manipulation tactic. One critical heuristic identified a direct link to a known malicious redirector, 'https://ttraff.ru/pify?keyword=qualitative+analysis+of+cations+and+anions+pdf', suggesting the document's primary purpose is to redirect users to malicious infrastructure. 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=qualitative+analysis+of+cations+and+anions+pdf
    • http://files.strathmoreapts.com/uploads/1/3/0/8/130815026/zawijofirazel-pikizerizixok.pdf
    • http://files.okaybeatz.com/uploads/1/3/1/3/131383771/jotunofafuvawasazini.pdf
    • http://tevifuded.lancasterlimo.net/uploads/1/3/1/4/131438137/d119f139986.pdf
    • http://files.whitehorsediocese.ca/uploads/1/3/1/4/131438216/vuxesaramob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2860038855.pdf
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/59871713267.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/dogesavogotelirule.pdf
    • https://cdn.shopify.com/s/files/1/0429/0553/4620/files/95666773518.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1364/files/guxulokadowosov.pdf
    • https://cdn.shopify.com/s/files/1/0448/4166/4669/files/porsche_pcm_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/50673200415.pdf
    • https://cdn.shopify.com/s/files/1/0429/6451/7023/files/zelowati.pdf
    • https://cdn.shopify.com/s/files/1/0438/5102/2501/files/85284375493.pdf
    • https://cdn.shopify.com/s/files/1/0428/7512/5923/files/lapamiferavixowoniduvufu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5016/2583/files/gudikasiruzuvajuzu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/35788357623.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fadanamimurusekebunom.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_off0000602c.bin
b7a0890ca58b3991f6f15941e372be7ad318804789f078f9c456440bf5ea242d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x602C 5276 bytes
font_01_sfnt_off00007247.bin
6e82c05fedd787aa6eda3ef66541f749b7a2ec815545a4b5f5a520f9fd3bab07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7247 10336 bytes

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