Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab83f370291cd202…

MALICIOUS

PDF

41.4 KB Created: 2020-08-14 00:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68be5ed63d438cdf62fd3ed9ec83c2d7 SHA-1: 145e33cbf3bed1927f80ed18fa9b4a65ca0e6757 SHA-256: ab83f370291cd20276d7a772830415980ac3456116fd49c8b076bf7cdc3802b5
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 a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains text referencing 'sneakerdog's phases of mitosis worksheet', suggesting a lure to disguise the malicious links. The presence of numerous links to external PDFs, including benign ones on Shopify, indicates a link farm strategy to potentially improve SEO or distribute malicious content.

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=sneakerdog%2527+s+phases+of+mitosis+worksheet
    • http://files.nwgyfl.club/uploads/1/3/2/6/132681212/8822677.pdf
    • http://rukitox.logcabinssnowdonia.co.uk/uploads/1/3/1/0/131071181/7957ded.pdf
    • http://files.calistosecretkennel.com/uploads/1/3/1/8/131856919/8137870.pdf
    • http://mibegonax.bodyandsolspa.com/uploads/1/3/0/8/130874493/7788568.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/benefits_of_social_media_for_business.pdf
    • https://cdn.shopify.com/s/files/1/0428/2381/1239/files/fofapesakogopuxanizawam.pdf
    • https://cdn.shopify.com/s/files/1/0431/7147/9713/files/short_and_long_vowel_sounds_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2802/files/83641689395.pdf
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/vajaviwaserapowaro.pdf
    • https://cdn.shopify.com/s/files/1/0431/0361/7173/files/lesuxoje.pdf
    • https://cdn.shopify.com/s/files/1/0434/9191/7989/files/vokesutedegovetazop.pdf
    • https://cdn.shopify.com/s/files/1/0432/6073/9752/files/best_apps_to_annotates_on_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0435/0954/7174/files/77235421259.pdf
    • https://cdn.shopify.com/s/files/1/0434/3834/2311/files/aditya_birla_health_insurance_claim_form.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_off0000621a.bin
a0264188b2b6b9bbef9f0a7956fb4fcef7d8e3a104a5016b85b47be5d8c840ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x621A 5716 bytes
font_01_sfnt_off00007581.bin
e5b83d7e39619503984b9d80189956d2cbbdd458b88dd65d71add6c297895a86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7581 10388 bytes

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