Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13c30e401b9b9ae…

MALICIOUS

PDF

46.5 KB Created: 2020-09-11 01:38:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e764f82d0426f433e6f9f7336489756 SHA-1: 4cc6816038d0fa18602327ba237004b91ef528cc SHA-256: a13c30e401b9b9ae940c00e524a1516fe918239c2f007d66464f3fdda6e58bac
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a search result for educational content. It also functions as a link farm, pointing to numerous other PDFs hosted on Shopify and static.usrfiles.com. The primary malicious URL is https://ttraff.club/wix?keyword=reading+plus+answers+level+hie+flooded+cities, which is likely used to lure victims into a phishing or malware distribution scheme. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=reading+plus+answers+level+hie+flooded+cities
    • http://vikegixim.mrsbradysclass.com/uploads/1/3/1/8/131871590/6291441.pdf
    • http://dadasezim.nowwwriters.ca/uploads/1/3/1/1/131164278/8531942.pdf
    • http://nasavejen.francinesflowers.co.uk/uploads/1/3/0/7/130740019/a74754.pdf
    • http://mawaloxuk.nicholasruscettaart.com/uploads/1/3/0/7/130775997/gikafibakag_motubimuf_pijagovulerod_sunipumapa.pdf
    • http://files.photographybyemmaclaire.com/uploads/1/3/0/8/130814283/nifigitiginamujare.pdf
    • https://cdn.shopify.com/s/files/1/0437/0969/4107/files/18312439692.pdf
    • https://cdn.shopify.com/s/files/1/0430/3273/9989/files/suferi.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/9966400528.pdf
    • https://cdn.shopify.com/s/files/1/0430/4171/8426/files/judge_dane_adjournment_request_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/2440/8991/files/50657240829.pdf
    • https://static.usrfiles.com/ugd/b16523_90c6ecf1dbbb498bbdd094f29ca35f16.pdf
    • https://static.usrfiles.com/ugd/2c608b_76d7fd8f2483404895ccd2dda05dd78c.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed65bc8767a9478181d30ce0d073edcc.pdf
    • https://static.usrfiles.com/ugd/a771bd_4dfde20aa28c4874a9b667e0906e3666.pdf
    • https://static.usrfiles.com/ugd/73f3b0_6fbe368a383f4378931dee22b4c94233.pdf
    • https://static.usrfiles.com/ugd/74c34a_31d119b055ef44d3ba2c81742a3885fe.pdf
    • https://static.usrfiles.com/ugd/529dbf_16cc02789eb54d4786d3e3342ed44e53.pdf
    • https://static.usrfiles.com/ugd/b97cba_5b516e7bf2e5420185557363adc31c22.pdf
    • https://static.usrfiles.com/ugd/ed64d2_5bfc41d61407425fbd6c00c6a4282d1c.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_off000076d3.bin
574a58afcba1d8b9772e9fdeffd55cc2bc274116866668861f09ecda510bedda
pdf-font-stream PDF embedded font (sfnt) at offset 0x76D3 5576 bytes
font_01_sfnt_off000089e5.bin
9823631e8f9f350a7ef35f1bc766ba18cb7d8014420f054f423725207a88837d
pdf-font-stream PDF embedded font (sfnt) at offset 0x89E5 10256 bytes