Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49517f18dbee449…

MALICIOUS

PDF

42.0 KB Created: 2020-08-22 01:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68801d6f597d39e9378a58adead09e94 SHA-1: fb59548bc4599e36556556eaa51bab99c5ad3a40 SHA-256: d49517f18dbee449b4109f61fc6f0f36b2ea02972192b3a9b20721fafe0aade9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=equivalent+fractions+on+a+number+line+worksheet'. This URL is presented within the document body, disguised as a worksheet. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The primary malicious intent appears to be directing users to the ttraff.ru domain.

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=equivalent+fractions+on+a+number+line+worksheet
    • http://files.crossfitremix.com/uploads/1/3/1/3/131379290/a822834d13ad55.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/rorevuxisadebepolapupebas.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/19222714266.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/capral_extrusion_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0434/3971/8562/files/windows_7_livecd.pdf
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/calcutta_university_form_2019.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99203043279.pdf
    • https://cdn.shopify.com/s/files/1/0433/4249/5895/files/badelotelenibiri.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kirojaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/37379170691.pdf
    • https://cdn.shopify.com/s/files/1/0434/2707/0104/files/92818433618.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/notavuzesulexi.pdf
    • https://cdn.shopify.com/s/files/1/0438/6134/4406/files/suduxovi.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_off0000656b.bin
d3027042bf25aa1ddd114e43c3f362ca448763e883336c974e4293d6c1537ccc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x656B 5560 bytes
font_01_sfnt_off00007844.bin
b41be00a8c35ce10f01b08c1f9f6cf8cb1c4f4f1abc24060e18bfb6a85a49f52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7844 10232 bytes

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