Malicious PDF — malware analysis report

Static analysis result for SHA-256 23b319837fcf6dd6…

MALICIOUS

PDF

34.3 KB Created: 2020-08-04 11:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76f42f5be4caec1eab090d09ecc513bd SHA-1: ed61e491810437bde7ce05add5022f93e15ae7c9 SHA-256: 23b319837fcf6dd6a5042a811aba9ae0e32ddf75494fea5575ee5eb474fed8f5
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to ttraff.com. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to Shopify domains hosting other PDFs. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=btec+sport+level+3+book+2+pdf, suggesting a lure to download or view content related to 'btec sport level 3 book 2 pdf'. The primary malicious IOC is the ttraff.com 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.com/pify?keyword=btec+sport+level+3+book+2+pdf
    • http://files.wickertmath.com/uploads/1/3/1/8/131871821/lebesefixarawej.pdf
    • http://files.lendalejohnson.com/uploads/1/3/1/8/131871621/tadasirejuvodatajuma.pdf
    • http://files.daniellewestdyk.com/uploads/1/3/1/4/131437236/ab07e48c.pdf
    • http://files.geowyo.com/uploads/1/3/1/6/131606807/sitavisuke-kujoxuru-nanekigoz-bamefokenudakon.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/wefomelum.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4632/files/pisunubexovanigoni.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/56024854783.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zotogobujadafozafinuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/66785862989.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/73363739762.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53059057271.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90675932679.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/kovofigalufile.pdf
    • https://cdn.shopify.com/s/files/1/0429/6661/4175/files/69836314746.pdf
    • https://cdn.shopify.com/s/files/1/0432/7240/5157/files/nuset.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/nutok.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_off00004706.bin
10f083ef84b3eabf5680aab176b3b5cb393db72908fdd548ee574337cd02909b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4706 5548 bytes
font_01_sfnt_off000059fc.bin
7eaafc1d2b4d0965bb521a5d76f345a1d143d017db0cbb3d87cc039f38e5069d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59FC 10020 bytes

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