Malicious PDF — malware analysis report

Static analysis result for SHA-256 a876abdbe9222b35…

MALICIOUS

PDF

44.3 KB Created: 2020-08-07 02:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b87b64f184f1346222f7d62542f7c3a SHA-1: ef743be6be013e4057173e5a91b10ae8c312a9dc SHA-256: a876abdbe9222b358abd0525a91f87a523e78d1f2e72660b3014c0a88226d93f
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, but one critical link directs to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the text "Grade 10 physical science control test term 3 pdf" and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a malicious redirector indicates an attempt to lead the user to a malicious site for further exploitation or credential harvesting.

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=grade+10+physical+science+control+test+term+3+pdf
    • http://files.cocrimeanalysis.org/uploads/1/3/2/7/132712206/6648375.pdf
    • http://files.oleanfoodpantry.org/uploads/1/3/1/3/131384071/zapuzederadum-sogotixeroj.pdf
    • http://files.support.famhealth.com/uploads/1/3/1/4/131437740/3357936.pdf
    • http://jaletuvad.taylorbarrettphotography.com/uploads/1/3/1/3/131380005/8109721.pdf
    • https://cdn.shopify.com/s/files/1/0434/3303/3880/files/70185253070.pdf
    • https://cdn.shopify.com/s/files/1/0438/4079/8885/files/45028266264.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7672/files/64576102612.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8848/files/viwupokobepifemig.pdf
    • https://cdn.shopify.com/s/files/1/0433/7981/8661/files/tafuverokolorad.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/money_lending_form.pdf
    • https://cdn.shopify.com/s/files/1/0438/6055/7984/files/9617595540.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/18586943727.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/xebuwopexaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/4786/1928/files/66958714210.pdf
    • https://cdn.shopify.com/s/files/1/0433/9132/0214/files/jasudafuzolaridamu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9405/files/traulsen_tech_support.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_off00006c6c.bin
a8eb5f15568907f743a552879aa2d8e5d351ec6f3a843a2a3fb351035eeb101b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6C 5888 bytes
font_01_sfnt_off0000805d.bin
79bcccdc06bc98c8dfc350c6149a586a5f8881372b4fc58f6a2622938e87a24e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x805D 10484 bytes

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