Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1a4919d72d429e7…

MALICIOUS

PDF

41.7 KB Created: 2020-08-15 04:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5be863da0bd56049f70e8a8333e0db79 SHA-1: 5aae29e06056f792f21ca0d8623c5e495832e0ec SHA-256: e1a4919d72d429e7d4570984043257b3316b298f46b4db7f68f3af1b9a46b88a
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, a significant portion of which point to a link farm hosted on Shopify. One of these links, disguised as a textbook resource, redirects to a malicious URL. This suggests a social engineering attack aimed at directing users to potentially harmful content. No scripts were extracted, limiting the analysis of further malicious behavior.

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=top+sites+to++textbooks
    • http://files.marina-wrestling.com/uploads/1/3/0/8/130814078/nunuwobelidowu-zezov-lemefofosijuk-rejajowodiw.pdf
    • http://pawuma.bbeautyco.com/uploads/1/3/0/7/130776167/piradiwezusiw.pdf
    • http://files.ecosphererestorationinstitute.org/uploads/1/3/0/8/130814439/dujadoravasu_gijuwasef_zarab_girikopuvotule.pdf
    • http://wimuxufuk.ambercove27waterfalls.com/uploads/1/3/1/1/131164250/7086188.pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/tapop.pdf
    • https://cdn.shopify.com/s/files/1/0450/6445/4294/files/catalogo_de_cedulas_brasileiras.pdf
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/97266644372.pdf
    • https://cdn.shopify.com/s/files/1/0439/2094/9403/files/10312224369.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/regional_manager_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/15503747574.pdf
    • https://cdn.shopify.com/s/files/1/0434/0426/3585/files/mutudikasuzilaxenitarewa.pdf
    • https://cdn.shopify.com/s/files/1/0436/9616/0921/files/bugofixasafomezepob.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/libro_epidemiologia_basica_bonita.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3407/files/personal_pronouns_worksheet_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/54627664815.pdf
    • https://cdn.shopify.com/s/files/1/0432/9376/9894/files/59739403542.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_off00006605.bin
79e16c5aa592f84c6d9097eda8c30f983a670f975304ce69161c5e3b82e7bbb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6605 4696 bytes
font_01_sfnt_off00007616.bin
04715a6e669180ec5229167400eea410c922e8a62de33d5115c0f34985bef25d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7616 10624 bytes

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