Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d59ce93d7257224…

MALICIOUS

PDF

43.7 KB Created: 2020-09-18 17:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebb6bd3b90e22920277674e999f3ea8c SHA-1: dd92f49399cb961a2a6284535840883f8c5503d9 SHA-256: 0d59ce93d725722426a7af1a756e325687fce085365e19ed032f1fe8adf38567
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=quarters+theory+pdf'. Additionally, it exhibits a PDF link farm heuristic, with numerous external PDF links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure users to 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.club/wix?keyword=quarters+theory+pdf
    • http://files.newsilkstrategies.com/uploads/1/3/1/8/131871480/654177.pdf
    • http://nizelaxem.garden-artworks.com/uploads/1/3/0/8/130874368/92b233b296e519.pdf
    • http://files.keitastudio.com/uploads/1/3/0/8/130874085/9331553.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/1504/4254/files/45697620381.pdf
    • https://cdn.shopify.com/s/files/1/0440/1784/4382/files/34229308291.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7262/files/90173482320.pdf
    • https://cdn.shopify.com/s/files/1/0433/1703/5166/files/definition_of_aggression.pdf
    • https://cdn.shopify.com/s/files/1/0434/6337/7056/files/kinetico_k60_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/1144/8729/files/miwasatotonevoserexizot.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1204107997.pdf
    • https://cdn.shopify.com/s/files/1/0430/7605/9290/files/dutazizufu.pdf
    • https://cdn.shopify.com/s/files/1/0460/1079/4143/files/23506836576.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8298/files/katan.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ee0.bin
790aa10c1b2f7ae38f52ef02cc68e3bf583c4d30e590f6f15019a02db1903a16
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE0 4988 bytes
font_01_sfnt_off00006ff3.bin
ef56eda4204cc3552fe53a9aee56007b4abfa0abd0e4729653f58d703b4bcde3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF3 10728 bytes
font_02_sfnt_off0000941d.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x941D 4324 bytes