Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e64d63269b141e…

MALICIOUS

PDF

39.4 KB Created: 2020-08-30 20:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: accb4128b96beb3f31a474bff8b2a212 SHA-1: 7d6a04820c15dc0c452b57bf347caef384102e6b SHA-256: 68e64d63269b141ed5d26a4fd6b7b6ab253345398378918cd0474842688d9125
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, specifically for containing a large number of external links, including one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and embedded URLs, suggesting an attempt to lure users to malicious sites, likely 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/wix?keyword=santaland+diaries+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3487/7850/files/l_oraison_de_saint_charlemagne.pdf
    • https://cdn.shopify.com/s/files/1/0434/4302/8120/files/nijupusikuvuwowoxutum.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6982/files/bionic_turtle_frm_notes.pdf
    • https://cdn.shopify.com/s/files/1/0447/2753/3724/files/nalini_singh_archangel_s_war_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0432/2574/3515/files/139946979.pdf
    • https://cdn.shopify.com/s/files/1/0430/4565/0586/files/963817596.pdf
    • https://cdn.shopify.com/s/files/1/0434/1363/5226/files/acls_guidelines_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6785/8334/files/microsoft_spider_solitaire_card_game_free.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a6e49bd056343b98de48587020d11e8.pdf
    • https://static.usrfiles.com/ugd/3e87bf_094e9f5f722045a8bbf9b96b163c5872.pdf
    • https://cdn.shopify.com/s/files/1/0433/7618/1400/files/92727941014.pdf
    • https://cdn.shopify.com/s/files/1/0434/7920/4006/files/zivugulujogubo.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_off00005c4c.bin
6bec721fa8a375386513823d6c5cdefe7cbaff620769d2bdc3df2474d5972536
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4C 5136 bytes
font_01_sfnt_off00006dc7.bin
58fc2f125fddbbef3e3035c5417d2c89ec4cf7df1021261fc4ab4152d38fe6de
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC7 10488 bytes