Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf2d715e8273fc6…

MALICIOUS

PDF

37.1 KB Created: 2020-08-27 16:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78c59e39810209d31836587ee1a55e10 SHA-1: 88a4e87e289a01bd4a2b7ecb793d7b3a48cdcc59 SHA-256: cdf2d715e8273fc6684a7d41f697e3d6198999b42e86c229ce7482b93ba8b28b
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct link to malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests the document is part of a larger scheme to manipulate search engine results, likely to lure unsuspecting users to malicious sites. The presence of multiple Shopify-hosted PDF links further supports the link farm hypothesis.

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=does+papa+johns+have+cheese+crust
    • http://files.e-learninginteractive.com/uploads/1/3/2/6/132695360/nozavokeli.pdf
    • http://duruwadu.mfreshproduce.com/uploads/1/3/0/7/130776791/39cdcf45b7.pdf
    • http://files.townofnewberlin.org/uploads/1/3/2/6/132681596/65366dd.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9347/files/zimesujurawozatikefe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/esl_games_for_young_learners.pdf
    • https://cdn.shopify.com/s/files/1/0429/6835/0886/files/scholarship_recommendation_letter.pdf
    • https://cdn.shopify.com/s/files/1/0431/9503/9905/files/nikuz.pdf
    • https://cdn.shopify.com/s/files/1/0438/5724/8421/files/sample_resume_file.pdf
    • https://cdn.shopify.com/s/files/1/0465/0467/3430/files/xixuxotibo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6032/1691/files/binomial_coefficient_examples.pdf
    • https://cdn.shopify.com/s/files/1/0448/0725/8269/files/arriba_6th_edition_student_activities_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/7663/9134/files/jinja2_load_template_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/9849/6412/files/pdf_book_reader_app.pdf
    • https://cdn.shopify.com/s/files/1/0440/0414/7350/files/paraphrasing_exercises_ielts.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_off000051fd.bin
1b596447f057d41a9788f4dc7b2f76406f36c3f87f7b734641925a351e7ce137		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51FD 5124 bytes
font_01_sfnt_off00006374.bin
b53086cae0512672af10e794f945a89be6d78d255fc0628963dbf3bc979ec09e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6374 10800 bytes

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