Malicious PDF — malware analysis report

Static analysis result for SHA-256 692d9c6a3f00dbca…

MALICIOUS

PDF

32.9 KB Created: 2020-08-25 13:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2944a32fc9dcad7f31a1739b04ae609 SHA-1: 8cf95b681d6eb76df761ff9bc8bc498295453341 SHA-256: 692d9c6a3f00dbca0626c652c7150508902c82589e580361cbb336b43b6231f4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL. This suggests an attempt to direct users to malicious infrastructure, potentially for phishing or malware distribution.

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.ru/pify?keyword=katyusha+guitar+tab+pdf
    • http://vokoxijan.georgiatechmocktrial.com/uploads/1/3/1/6/131637136/waman_kuleriduzat.pdf
    • http://files.truemedicine.ca/uploads/1/3/0/7/130776167/putefakan_guvola.pdf
    • http://files.montdeoliviersleglisededieu.com/uploads/1/3/1/4/131453943/1145d5e5cf2296.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3981/7890/files/xesulexejazagu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5091/0364/files/ruwagajodun.pdf
    • https://cdn.shopify.com/s/files/1/0433/9741/5077/files/xenukolasonuwuvuraxu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8145/6023/files/rosetta_stone_german_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0430/7301/1866/files/pic_assembly_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/37064464918.pdf
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/vidudubafekuzezol.pdf
    • https://cdn.shopify.com/s/files/1/0434/9843/8820/files/happy_birthday_fonts_calligraphy.pdf
    • https://cdn.shopify.com/s/files/1/0435/7737/6936/files/apache_server_32_bit.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_off00004296.bin
5d78e6319179963bf2690e5c34b278750b9994ebdac5d6d6deb6c315fb64d902
pdf-font-stream PDF embedded font (sfnt) at offset 0x4296 5484 bytes
font_01_sfnt_off0000553b.bin
690668c3efadfc7efc6b497f8349a5070886e6a603634e0623401c060e9474ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x553B 10840 bytes