Malicious PDF — malware analysis report

Static analysis result for SHA-256 afaeb6472b1247bd…

MALICIOUS

PDF

39.9 KB Created: 2020-08-22 01:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ca8d7e27ee54f2800a1166f5dab783c SHA-1: 92adf80302905cd3f24f2d9e8036a56377a9b467 SHA-256: afaeb6472b1247bd28ef7e861434c09fc5ee80940e9084ffe3c9a46c7e80a858
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 of which point to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains the text 'Uncountable nouns exercises with answers pdf' and the malicious URL, suggesting a lure to disguise malicious activity as an academic resource. The presence of a malicious redirector indicates an attempt to lead the user to a further stage of attack.

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.com/pify?keyword=uncountable+nouns+exercises+with+answers+pdf
    • http://fepabe.therosados.org/uploads/1/3/0/8/130874330/lisakiba_velakawasu.pdf
    • http://files.bigbellceramics.com/uploads/1/3/1/8/131872042/c3ec560.pdf
    • http://files.southwestcactusshop.com/uploads/1/3/1/3/131383821/66ff16bb4c07b6.pdf
    • http://files.helpgmsrlss.com/uploads/1/3/1/4/131413678/fanezowakuzutiwima.pdf
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/79305085911.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/nezuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/91522477450.pdf
    • https://cdn.shopify.com/s/files/1/0433/9446/5948/files/39104313732.pdf
    • https://cdn.shopify.com/s/files/1/0432/1997/6350/files/luzamirububim.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/43208715668.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4745/files/64015914563.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51098187394.pdf
    • https://cdn.shopify.com/s/files/1/0432/8770/7804/files/pabagovikopanotuvo.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_off00005dd8.bin
fa447506fe6549cbaa9e6b46cb07e41ecd9010799912e733f77e36e2f634050b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD8 5536 bytes
font_01_sfnt_off000070ab.bin
395ee75955b1b5f85391e1aed21f080f15c250f6531832b9aa076adc293724c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70AB 10100 bytes

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