Malicious PDF — malware analysis report

Static analysis result for SHA-256 424cec82feaf4451…

MALICIOUS

PDF

37.0 KB Created: 2020-08-06 10:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ed7f6c5f474ee3a0683a762a05b887e SHA-1: e65f88fbd241a6597b811fd8727abe8e318f21c9 SHA-256: 424cec82feaf44514fc5afda32cd24a1de360e3890cbea9e5c3179af7b05e489
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are hosted on Shopify, suggesting a link farm for SEO poisoning or to obscure malicious redirects. One critical heuristic identified a direct link to a known malicious redirector, 'ttraff.cc', which is disguised as a student loan promissory note. This indicates a social engineering attempt to trick users into visiting a malicious site.

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=student+loan+master+promissory+note+pdf
    • http://files.connectingmindfully.com/uploads/1/3/1/4/131407235/likumerag.pdf
    • http://files.trbtoolsofthetrade.org/uploads/1/3/0/8/130814121/sulezo.pdf
    • http://files.sdwoundedwarriortennis.com/uploads/1/3/0/9/130969476/tunakafes-dinonolukefasi.pdf
    • http://files.kirkistownprimaryschool.com/uploads/1/3/2/7/132740424/ded228e599a0071.pdf
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/refx_nexus_2_download_link_full_content.pdf
    • https://cdn.shopify.com/s/files/1/0436/7689/3334/files/11014235137.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/how_to_make_crack.pdf
    • https://cdn.shopify.com/s/files/1/0439/1262/6344/files/jaritikokowemajoxatiz.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/xizuzasasaniwofubu.pdf
    • https://cdn.shopify.com/s/files/1/0440/0106/7166/files/problem_solving_activities_for_preschoolers.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/3249983632.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/94504606795.pdf
    • https://cdn.shopify.com/s/files/1/0439/1796/7528/files/guxakiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/dress_blues_army.pdf
    • https://cdn.shopify.com/s/files/1/0434/2661/1357/files/fivatunoweziteli.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/kujuxiberiju.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/kedinenaliginoruf.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_off000052ee.bin
bd6a3dfa827c178603a0258ec7a0707f7edd7653299b51d2c924bb5b1bf87e5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52EE 5392 bytes
font_01_sfnt_off00006539.bin
18e8a4341460499632a49ba152316b97dee0f36c61dc5ca971f374b6cc779314		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6539 9904 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.