Malicious PDF — malware analysis report

Static analysis result for SHA-256 111317f5e8872489…

MALICIOUS

PDF

47.0 KB Created: 2020-08-10 10:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 556c4a3b0bc8d40d74fe9c95a8e13bf4 SHA-1: 9a459f38bbf7c3ab9ed50f0ed5f322dddb355c2c SHA-256: 111317f5e8872489f75d0852935847bac88ff6f5b378f97146f4b97c60c562f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.cc/pify?keyword=br%25C3%25BCche+multiplikation+aufgaben+pdf', is flagged as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=br%25C3%25BCche+multiplikation+aufgaben+pdf
    • http://files.cbinderyservices.com/uploads/1/3/2/6/132681885/ligewu.pdf
    • http://files.baugallery.org/uploads/1/3/2/6/132695465/ff2e90aa10.pdf
    • http://files.thomasdouglas.fr/uploads/1/3/0/8/130874610/dc0ca875392.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2331/9715/files/9436252141.pdf
    • https://cdn.shopify.com/s/files/1/0428/7060/3932/files/honda_cb750_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/9407523573.pdf
    • https://cdn.shopify.com/s/files/1/0453/8272/9896/files/definition_of_motivation_file.pdf
    • https://cdn.shopify.com/s/files/1/0439/0925/1227/files/wawawebudexogoline.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3615/files/weather_la_jolla_shores.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5195/files/84897831706.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51906755497.pdf
    • https://cdn.shopify.com/s/files/1/0439/0692/4712/files/povewutetijone.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/taqueria_arandas_menu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3077/1869/files/81596282444.pdf
    • https://cdn.shopify.com/s/files/1/0435/9864/3363/files/39789490030.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c18.bin
663feff2ad4306c4a659b23ae9d5fb4640f50ac2ad35942bddd4fec8346bd436
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C18 5764 bytes
font_01_sfnt_off00007f52.bin
b9c898d2f0835e7c2e54778b75552c964ee80925b1f90e4f8f4110c8ebc20ae5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F52 14736 bytes