Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4df4e0ef2c5f404…

MALICIOUS

PDF

42.9 KB Created: 2020-08-26 03:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00f9551289539c16d1353166da90be1f SHA-1: 84df9a424a2ab391ff5eb61486c71e8d9da87410 SHA-256: e4df4e0ef2c5f40402147866381a298bf6ed5e99080a40dc2021c64977962038
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it's a malicious redirector, linking to a URL that appears to be part of a link farm. The document body contains a call-to-action phrase, suggesting a lure to click the embedded link. The primary malicious IOC is the redirector URL, which leads to further obfuscated links.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=afterlife+with+archie+read+comics+online
    • http://files.thebusybeelearningcenter.com/uploads/1/3/2/7/132740237/rarir_vefejitu.pdf
    • http://files.veenalifestyle.com.au/uploads/1/3/2/3/132302764/a52f2792c4a7aa.pdf
    • http://files.blumenstiellab.org/uploads/1/3/1/3/131380001/peraxupuzagod.pdf
    • https://cdn.shopify.com/s/files/1/0431/6718/7108/files/waponubalagitexogawof.pdf
    • https://cdn.shopify.com/s/files/1/0432/3577/0532/files/inspector_calls_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/58095289522.pdf
    • https://cdn.shopify.com/s/files/1/0432/1076/8546/files/59345911839.pdf
    • https://cdn.shopify.com/s/files/1/0465/5097/4614/files/netobivafuzebiromudanurab.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/73587115765.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8165/files/cognitive_behavioral_therapy_for_drug_addiction.pdf
    • https://cdn.shopify.com/s/files/1/0435/5201/4491/files/bhajana_patalu_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0462/8588/1505/files/madivubusumovimure.pdf
    • https://cdn.shopify.com/s/files/1/0431/7960/6176/files/50483035383.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1542/files/reading_and_use_of_english_fce_2015.pdf
    • https://cdn.shopify.com/s/files/1/0438/2919/9005/files/geographic_information_systems_and_science_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/8116/3157/files/38751472745.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_off0000691e.bin
a7c755f2ccc325be4f4d45376eeaca408b5c8028dd79dcaac425022b8c9a519c
pdf-font-stream PDF embedded font (sfnt) at offset 0x691E 5344 bytes
font_01_sfnt_off00007b2a.bin
b71853b108e516ce1ea0b558d173c971125eb8558db77fe888b5a440f3cfc2fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2A 10308 bytes