Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc3df6149b8b8c2…

MALICIOUS

PDF

43.8 KB Created: 2020-08-01 09:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 027deef35cccea61e890f4bce9e61ebb SHA-1: a038dd251f1079daa3329fd44e71d150919744e6 SHA-256: 9bc3df6149b8b8c2cec4c695312d8a9c4846b1c7a700785a17a9f00229ec290c
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=delete+tag+git'. Additionally, it exhibits a PDF link farm with numerous external links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body contains obfuscated text and embedded URLs, reinforcing the malicious redirector and link farm findings.

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.cc/pify?keyword=delete+tag+git
    • http://files.goodpasturecheerleading.com/uploads/1/3/1/0/131070161/rotuvinavowo_xabetimetaf_bizag.pdf
    • http://files.bosk-bioproducts.com/uploads/1/3/1/8/131872178/0ade1.pdf
    • http://files.abitleftandabitlost.com/uploads/1/3/1/4/131406744/6136312.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/63106721535.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tagesagebog.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/turob.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9186/files/jupufaveradejebotozidili.pdf
    • https://cdn.shopify.com/s/files/1/0440/8826/2821/files/64029862931.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32343356061.pdf
    • https://cdn.shopify.com/s/files/1/0432/4491/2802/files/pagidovulikizef.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5908/files/xubogupupamupure.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/computer_science_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1393/9101/files/97840970399.pdf
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/tanuraxuzifi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0133/0339/files/bexogozovopukukizuxisud.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/wazegedonalaxerarifige.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/25093608824.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/23483292079.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_off000067e8.bin
9d27c478400d1bbd4a57a148231bf611eb0ac19d0b4933b0a46ba21a5d7f2f18
pdf-font-stream PDF embedded font (sfnt) at offset 0x67E8 4576 bytes
font_01_sfnt_off00007797.bin
97c142d0e2c8d01653e4abaa8f9b0dc52f0f1197585b4ee52b69bc7f00fd10c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7797 13092 bytes