Malicious PDF — malware analysis report

Static analysis result for SHA-256 8445f8ffae72f184…

MALICIOUS

PDF

40.9 KB Created: 2020-08-05 17:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da67d4dabffeeaacc9669a0e70121bd2 SHA-1: 2f17e85531db0a149132502bed6dbe0b60e6a3ac SHA-256: 8445f8ffae72f1847323bf66e7db70695ac57903438ca1121e1d6564019cb407
154 Risk Score

Malware Insights

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

This PDF document contains a link farm and a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=capitalism+and+communism+pdf', indicating a likely phishing or scam attempt. The presence of numerous external PDF links suggests an attempt to manipulate search engine results or distribute further malicious content.

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=capitalism+and+communism+pdf
    • http://jeleku.margek.com/uploads/1/3/1/4/131453284/nomuderofixumomafidi.pdf
    • http://files.ylcollegesta.org/uploads/1/3/0/7/130738881/vobuxowab-zeladusej.pdf
    • http://files.southtownscatholic.org/uploads/1/3/1/6/131636990/3996155.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.pdf
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/pubosifozi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/82960118523.pdf
    • https://cdn.shopify.com/s/files/1/0438/9486/6088/files/jukosawuleguguvemeduxusi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/15524939531.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/wokoda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jedufejaselikaruratemop.pdf
    • https://cdn.shopify.com/s/files/1/0431/9808/7328/files/kifan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/jajodopatedugapuzabozis.pdf
    • https://cdn.shopify.com/s/files/1/0432/2423/6199/files/67895369408.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_off000062f6.bin
38e89e5fa345e1e57bb800ec62e901bf7ad3964f82620eaa7647d1ed788bf9c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x62F6 5108 bytes
font_01_sfnt_off00007444.bin
ae7f2613c4219f5148041b1bc74a7bfa53b74c175495712946baa3e1268341a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7444 10248 bytes