Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d41b120c23591ff…

MALICIOUS

PDF

44.5 KB Created: 2020-08-11 13:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e07e805d3b26846aaaafa4c8bb164af SHA-1: e25c989cd3fc47034614d077ad0cbe7be1cf7c2d SHA-256: 3d41b120c23591fff0a9c1b0631db637a4a72044d50b0171353935a9770f81a8
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=export+kindle+cloud+reader+to+pdf'. This URL is presented within the document body, suggesting a social engineering lure to trick users into clicking it. The PDF also exhibits characteristics of a link farm, with numerous external links, many of which are hosted on Shopify but point to potentially malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=export+kindle+cloud+reader+to+pdf
    • http://bonisob.cullenelementary.com/uploads/1/3/2/3/132303382/kudinatezixa_vasusego_nitujogipako.pdf
    • http://files.flynnmediagroup.com/uploads/1/3/2/6/132681492/finabate.pdf
    • http://nanesa.drlindaford.com.au/uploads/1/3/0/8/130874493/8965338.pdf
    • https://cdn.shopify.com/s/files/1/0437/7670/4669/files/coordinating_conjunction_examples.pdf
    • https://cdn.shopify.com/s/files/1/0440/8950/7990/files/bank_exam_gk_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/4995679699.pdf
    • https://cdn.shopify.com/s/files/1/0433/4567/4389/files/arterial_puncture_for_blood_gas_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/81247064219.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/2738309985.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedifoniwupub.pdf
    • https://cdn.shopify.com/s/files/1/0432/2135/2606/files/honda_trx450r_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/bujufarudimidivoviv.pdf
    • https://cdn.shopify.com/s/files/1/0437/8283/2289/files/88886761705.pdf
    • https://cdn.shopify.com/s/files/1/0434/2064/7576/files/vofafofaxabirowitexadatij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38935964995.pdf
    • https://cdn.shopify.com/s/files/1/0438/6832/4005/files/70701879466.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_off000070ae.bin
64a46e0bb0b3667c3d2eb7e020ca01fba6588b437d676ffc6de3586ad4449d37
pdf-font-stream PDF embedded font (sfnt) at offset 0x70AE 5060 bytes
font_01_sfnt_off000081fe.bin
478205ceef7a339628d82833f2b97ee390765e684438f479273475e1cec7195c
pdf-font-stream PDF embedded font (sfnt) at offset 0x81FE 10316 bytes