Malicious PDF — malware analysis report

Static analysis result for SHA-256 c146b3dcfa82738d…

MALICIOUS

PDF

44.4 KB Created: 2020-08-17 06:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e32549fed99c8c41dbd03632beba5d7 SHA-1: db570bdbc33ab2d43816859f46eec6de69fd6277 SHA-256: c146b3dcfa82738d4efc38657c7491bdbc5258c45209d51faaf3bd2e9f039e98
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a deceptive title and body text suggesting it is a purchase agreement template, but it embeds multiple links. One critical heuristic indicates a malicious redirector link to 'https://ttraff.ru/pify?keyword=amendment+to+purchase+agreement+template', which is likely intended to lead the user to a malicious site. Another heuristic identified a PDF link farm, with many links pointing to Shopify domains, but the primary malicious link is the redirector.

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=amendment+to+purchase+agreement+template
    • http://pugoxise.grissomvb.net/uploads/1/3/1/3/131380500/5e820a8aa.pdf
    • http://files.unnatinarang.com/uploads/1/3/1/3/131398333/fovopavik.pdf
    • http://files.trailsandtrilliums.org/uploads/1/3/0/7/130738875/4543849.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2137/files/android_1_mod_apk_dr_driving.pdf
    • https://cdn.shopify.com/s/files/1/0439/0594/1672/files/call_of_duty_app_store.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9512/files/99250521038.pdf
    • https://cdn.shopify.com/s/files/1/0429/8234/2815/files/bozuwigadesukimirak.pdf
    • https://cdn.shopify.com/s/files/1/0430/7160/2855/files/adobe_to_word.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/64380741639.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/flawed_democracy.pdf
    • https://cdn.shopify.com/s/files/1/0436/1807/4786/files/65261405310.pdf
    • https://cdn.shopify.com/s/files/1/0433/6451/6005/files/debate_topics_for_high_school_students.pdf
    • https://cdn.shopify.com/s/files/1/0439/5122/7048/files/taxamopuruzixanopotukawor.pdf
    • https://cdn.shopify.com/s/files/1/0427/9051/8940/files/gumugaledolikadoraleximir.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_off0000706e.bin
9d8265d4c88d034f522c6a41b10d4fa587101f683bde2f8d8d143ca69421f0ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x706E 5476 bytes
font_01_sfnt_off000082d5.bin
97c3bdfeb0f9be9d681a6ab1f041da9ff4da69c5bda9ea386aee56efb1e2ad90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82D5 9844 bytes

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