Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5ab50489faa50cc…

MALICIOUS

PDF

43.5 KB Created: 2020-08-10 21:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 828d1df5dc84b29a70c858226a9e3f86 SHA-1: 9736a335f4dc5a64483ff33a25fa25abe3b30c61 SHA-256: b5ab50489faa50cc15fc26a7c7b8923ac33e3daedf23df2edbb70b4662ba0fb5
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 of which point to external PDF files hosted on Shopify. One of the primary links, however, redirects to a known malicious domain, ttraff.ru, with a keyword suggesting a lure for "auto workshop manuals pdf". This indicates a phishing or redirection attack aimed at users searching for technical documents. 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=auto+workshop+manuals+pdf
    • http://files.etiwandalibrary.com/uploads/1/3/0/9/130969356/koguwiw_xisoxudija_pudiz_sipiluse.pdf
    • http://files.classofwestk.org/uploads/1/3/1/0/131070230/3764449.pdf
    • http://files.nhfrea.org/uploads/1/3/2/6/132696128/niwamiwuxa-mixudibej-mufivazugan.pdf
    • https://cdn.shopify.com/s/files/1/0432/8944/4510/files/90352872286.pdf
    • https://cdn.shopify.com/s/files/1/0432/2213/9041/files/pajitunirivemus.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/makovenajanunonez.pdf
    • https://cdn.shopify.com/s/files/1/0427/9376/2975/files/gerejomokaxegesinidutan.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/sugefib.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/sawoki.pdf
    • https://cdn.shopify.com/s/files/1/0432/8377/5643/files/vizasoludutixamosukili.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/quisiera_ser_un_pez.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/47895593789.pdf
    • https://cdn.shopify.com/s/files/1/0437/6199/1841/files/8576373548.pdf
    • https://cdn.shopify.com/s/files/1/0430/9804/6621/files/984652387.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_off00006cb9.bin
0186599ad0127c92eaeda9322d02a19b4f3087db4c2898c44f4c6d61f89bb3b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB9 5424 bytes
font_01_sfnt_off00007f1a.bin
8d49145443216f52753a7107900c095d9254d30ecd255f1d68b902ab42276e54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1A 10072 bytes

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