Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7bb290af8a81f7…

MALICIOUS

PDF

50.1 KB Created: 2020-07-18 05:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da857f9d38689165df8b5e4eac2ea745 SHA-1: 1f6e8f1eee4c8d5cdb6bcc4ba1e98ebe0260bb42 SHA-256: 5e7bb290af8a81f71bd1cb175de6a0470180b6395617c918f042027db072f40c
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links directs to 'ttraff.com', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a date, but no explicit instructions or lures beyond the embedded links.

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.com/wb?keyword=wisdom%20from%20the%20mastery%20of%20love%20pdf
    • http://files.copanelloentertainment.com/uploads/1/3/0/7/130738806/6839011.pdf
    • http://files.djawest.com/uploads/1/3/2/6/132683252/3834a8b8.pdf
    • http://files.mothermoonwellness.com/uploads/1/3/0/8/130874495/996169.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/1564277312.pdf
    • https://cdn.shopify.com/s/files/1/0432/3665/5259/files/gizerefumepog.pdf
    • https://cdn.shopify.com/s/files/1/0434/0560/7070/files/xovesififodabovebotib.pdf
    • https://xenosuso.files.wordpress.com/2020/07/25548646583.pdf
    • https://fikifuti.files.wordpress.com/2020/07/20084610327.pdf
    • https://povevujojim.files.wordpress.com/2020/07/xowawegetun.pdf
    • https://muwunonuraw.files.wordpress.com/2020/06/tuvovojinatogopo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/nazekukenezenon.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/zawumuga.pdf
    • https://cdn.shopify.com/s/files/1/0432/2993/7832/files/bitogipovawevutakevazap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58657968950.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35209966956.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28664871254.pdf
    • https://cdn.shopify.com/s/files/1/0433/4410/1544/files/nawanavizirokazexano.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_off00008896.bin
f06a638a5841b4dba34c16283781cbc2bcc0c00d15485287dc4960f69337e26c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8896 5140 bytes
font_01_sfnt_off00009a20.bin
9ebc7eb0e1cfd5a5a6ce6a3bd5e06f275623ff3c7d5da755f8341a1fffec76da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A20 9760 bytes

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