Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9fd069f2d6e0b3e…

MALICIOUS

PDF

53.4 KB Created: 2020-07-28 23:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6819fba9a8df5d494329164e8bb579b4 SHA-1: 9fb3ccae15a92d7a1a25bd66b07c46aaec10fe70 SHA-256: d9fd069f2d6e0b3ecf65578471f06c01930b3a08d99f7803b818215b04236aeb
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Grade 12 chemistry textbook answers'. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the malicious 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.cc/pify?keyword=grade+12+chemistry+textbook+answers
    • http://files.planet-fitness.co.uk/uploads/1/3/1/6/131636914/f819c57b177.pdf
    • http://files.lifefashionfun.com/uploads/1/3/0/9/130969980/3700c9f.pdf
    • http://files.expressionstea.com/uploads/1/3/0/7/130776040/bemazal.pdf
    • http://files.lynnespaintings.com/uploads/1/3/2/6/132681164/d610932448.pdf
    • http://files.expressionstea.com/uploads/1/3/0/7/130776040/bemazal.pd
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pewugokujugiwiburonanas.pdf
    • https://cdn.shopify.com/s/files/1/0429/3709/0211/files/pokokov.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/20012181745.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8918/files/panukovik.pdf
    • https://cdn.shopify.com/s/files/1/0435/1049/7434/files/valizudadavumonodusik.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/65684630293.pdf
    • https://cdn.shopify.com/s/files/1/0433/7506/7297/files/rejenevef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80884551140.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/58203344199.pdf
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/sapuvixebafufoputebaloze.pdf
    • https://cdn.shopify.com/s/files/1/0430/9804/6621/files/52526833922.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/kulagokamiluku.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_off00009327.bin
f113ff5ac8dffd0c0c134a0e9316769c744e93257b1affae5ad7c285c682fa15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9327 5616 bytes
font_01_sfnt_off0000a636.bin
0f31a45590931496ca833a98dfdbf463bc064265e88d175d9322f63d896f44b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA636 10028 bytes

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