Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde533493d924767…

MALICIOUS

PDF

38.3 KB Created: 2020-08-16 18:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d1dface3fce970dd8d8cab642bc71a6 SHA-1: 50d54af7126959b533aab40f3f11861b6f16fb41 SHA-256: fde533493d924767bc82329d43f4225a49f7f1dbf2bff538e795826cea86b4b9
150 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm or SEO manipulation scheme, embedding a large number of external links, many pointing to Shopify-hosted PDFs. Crucially, one embedded link redirects to malicious infrastructure at 'ttraff.ru', indicating a potential phishing or malware distribution vector. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=classification+of+matter+note+taking+worksheet
    • http://jekazina.glassondemandinc.com/uploads/1/3/1/8/131871825/36935.pdf
    • http://pusixike.sacramentoeslprogram.org/uploads/1/3/0/7/130776542/zariwixegilik.pdf
    • http://files.partrealpartdream.com/uploads/1/3/0/7/130775145/7758762.pdf
    • https://cdn.shopify.com/s/files/1/0434/0187/1512/files/wuzuluginalufirivixibu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1825/4498/files/business_communication_notes_for_bcom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/semigo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7487/1711/files/vocabulaire_anglais_affaires.pdf
    • https://cdn.shopify.com/s/files/1/0433/0700/8168/files/driver_s_license_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/30274488254.pdf
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/99420085633.pdf
    • https://cdn.shopify.com/s/files/1/0437/6612/0609/files/kexotiwaru.pdf
    • https://cdn.shopify.com/s/files/1/0433/8073/6165/files/83180180032.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6936/files/lawewejojawavefiwofuke.pdf
    • https://cdn.shopify.com/s/files/1/0436/7518/9401/files/cerere_inmatriculare_auto_bucuresti.pdf
    • https://cdn.shopify.com/s/files/1/0440/8321/6549/files/takosijaditi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1666/4734/files/89057531712.pdf
    • https://cdn.shopify.com/s/files/1/0435/0545/1160/files/kanipisiganogesetaw.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_off00004c0a.bin
bf656f55f2896a75647dc79e8c876db9c93856cda646da92091ec2ed040537d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C0A 5260 bytes
font_01_sfnt_off00005dc9.bin
b75b25c84d666276c6a0b70cce8a3476637261eec56a883af09210be0668d3bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC9 9348 bytes
font_02_sfnt_off00007d9f.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9F 4324 bytes