Malicious PDF — malware analysis report

Static analysis result for SHA-256 2486934cc70a5cda…

MALICIOUS

PDF

38.6 KB Created: 2020-08-12 21:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94d7f0cd119c31e07959fc89f4ab3b7a SHA-1: 48119f6f3348d7fde0d9c342562b823cd1914af5 SHA-256: 2486934cc70a5cda5bdf35583bf60c11e014ede3c18a1f92a701ca37f42e53f3
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The primary malicious URL is https://ttraff.ru/pify?keyword=compact+oxford+english+dictionary+pdf, which is likely used to redirect users to a further malicious destination.

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=compact+oxford+english+dictionary+pdf
    • http://files.wembleylodge.com/uploads/1/3/0/9/130969993/6745111.pdf
    • http://files.continuingeducationwnc.org/uploads/1/3/1/6/131607075/ab5c8b23b62deac.pdf
    • http://setaride.allisonevansphd.com/uploads/1/3/1/4/131437615/1906852.pdf
    • https://cdn.shopify.com/s/files/1/0434/9673/4880/files/78291029463.pdf
    • https://cdn.shopify.com/s/files/1/0427/5824/2470/files/90787517084.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zigomotixiwututorevibalu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/gajipopemuvi.pdf
    • https://cdn.shopify.com/s/files/1/0448/2259/3698/files/esperanza_rising_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/pijagivivukoridobujube.pdf
    • https://cdn.shopify.com/s/files/1/0435/1285/6731/files/xatekuwabijemu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8936/files/12946875308.pdf
    • https://cdn.shopify.com/s/files/1/0431/1315/2673/files/bawanodixiw.pdf
    • https://cdn.shopify.com/s/files/1/0441/1323/2024/files/petsmart_job_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0436/9635/7530/files/39305204165.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_off00005852.bin
a10dd9a665637015ea819fa2c5a520cd06d52fad94e2578410313e6330b0e379		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5852 5644 bytes
font_01_sfnt_off00006b5e.bin
a36ffd8ef18134bfbd7e6d309353126aa4e715b71c4af8a5e232fd1166b92048		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5E 10456 bytes

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