Malicious PDF — malware analysis report

Static analysis result for SHA-256 1274e62e3fda11ae…

MALICIOUS

PDF

41.7 KB Created: 2020-08-30 10:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84f82b514dd6a09255ecd99411900bfe SHA-1: b88a9c0ce7fc30ae226beb28e6d9a6756ffe7983 SHA-256: 1274e62e3fda11ae69af59cbfce1b061f8bdd8dacbbba1fc45fa1a6aab10a262
154 Risk Score

Malware Insights

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

The PDF contains embedded links and text that redirect to a known malicious domain, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. The presence of numerous external PDF links further indicates a link farm designed to distribute 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/wix?keyword=warframe+nav+coordinates
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_ba607913a8904a358d37d38dc01a3227.pdf
    • https://static.usrfiles.com/ugd/b8c837_1203834decad448b98ae5f210da8ec49.pdf
    • https://static.usrfiles.com/ugd/b8c837_40838fca2501488ba6a597bd8f0cc2a8.pdf
    • https://static.usrfiles.com/ugd/19103d_7c4e90dc5eff4cf88cb9a172af8d604f.pdf
    • https://static.usrfiles.com/ugd/b8c837_0594522118634434b89fcab4cf604644.pdf
    • https://cdn.shopify.com/s/files/1/0428/9495/0559/files/42050532525.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/29264057886.pdf
    • https://cdn.shopify.com/s/files/1/0431/5709/4551/files/accounting_salary_guide_australia_2018.pdf
    • https://cdn.shopify.com/s/files/1/0434/6147/6504/files/60756458619.pdf
    • https://cdn.shopify.com/s/files/1/0433/4403/5993/files/ceremonies_of_possession.pdf
    • https://cdn.shopify.com/s/files/1/0431/7052/9436/files/comparing_mitosis_and_meiosis_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/29639940872.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f4427a72ee54ff1ae66f07e83c5cc71.pdf
    • https://static.usrfiles.com/ugd/b8c837_39557059412d42bda1aebf6696bb70ad.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_off0000647f.bin
7566985f3a8d3a21c316897519fc1439b49fb254a7f37e760279c17bf0c1333f
pdf-font-stream PDF embedded font (sfnt) at offset 0x647F 5208 bytes
font_01_sfnt_off00007627.bin
ba065b52dc0ba94dc169044ad7feb40e877f71049029d7d7d86f77cf187cbe09
pdf-font-stream PDF embedded font (sfnt) at offset 0x7627 10476 bytes