Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd5172a1ebae7c08…

MALICIOUS

PDF

50.6 KB Created: 2020-08-04 23:42:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ea6bb749d24cf830808e6c4d857a743 SHA-1: b4b28a4fecbde43716ad6f0a7146e0cdd5eb004d SHA-256: cd5172a1ebae7c088ab0a382a5726a97eac631710fe314066cb9849c8879248d
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing confirms this, indicating the document is designed to lead users to harmful sites. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the file. No scripts were extracted, but the presence of a malicious redirector link is sufficient evidence of 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.ru/pify?keyword=attitude+magazine+thailand+pdf
    • http://files.kansascitysportsfan.com/uploads/1/3/1/4/131408256/b62b1a04e46a318.pdf
    • http://files.umassasce.com/uploads/1/3/0/8/130813934/wekipavu_gurugujixeget_dijoramakego.pdf
    • http://files.sunnybottom.com/uploads/1/3/1/8/131856052/1722753.pdf
    • http://files.kujawaorchids.com/uploads/1/3/0/9/130969089/6d529ff9216f522.pdf
    • http://files.qiboacupuncture.com/uploads/1/3/1/4/131452842/e4e48d84c6e5386.pdf
    • https://cdn.shopify.com/s/files/1/0432/8387/3942/files/79656160706.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3478/files/crystal_reed_age.pdf
    • https://cdn.shopify.com/s/files/1/0430/5197/4818/files/28348820132.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8861538602.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/48520691741.pdf
    • https://cdn.shopify.com/s/files/1/0434/3486/8897/files/81773485206.pdf
    • https://cdn.shopify.com/s/files/1/0438/8922/9979/files/66135950252.pdf
    • https://cdn.shopify.com/s/files/1/0436/0637/6611/files/how_to_hack_quizlet_live.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71409998288.pdf
    • https://cdn.shopify.com/s/files/1/0431/0099/5741/files/vivogupoluwozonopoku.pdf
    • https://cdn.shopify.com/s/files/1/0434/6822/6725/files/big_ideas_math_algebra_1_assessment_book_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/3804/0487/files/1000_palabras_en_ingles_y_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17673355306.pdf
    • https://cdn.shopify.com/s/files/1/0429/8768/4003/files/meade_ds-_114.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e4e.bin
371969e2c6fab4fe0ede3edfa7f4e8013743752e5df4f949f0489da2e346f915
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4E 5220 bytes
font_01_sfnt_off00007fee.bin
6371dd92dbf1622eb9b00e4478d341ab4b8f604b1387483c671c66ccc0a0b9af
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEE 8968 bytes
font_02_sfnt_off00009923.bin
9453054735a4b3e629a00599fe4e094bcf77bd8126cc6eec002967b9059afe63
pdf-font-stream PDF embedded font (sfnt) at offset 0x9923 10752 bytes