Malicious PDF — malware analysis report

Static analysis result for SHA-256 6642201660c252da…

MALICIOUS

PDF

35.5 KB Created: 2020-08-22 10:48:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b759cd205912184f862574b8f061fc8d SHA-1: 7bfe7dfa46dd20dbde76e9ab15e1656194d824a5 SHA-256: 6642201660c252da0038d85507d13b72e3ba03d3a18da0048535bdc9ec4c0d8c
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'cg love status video 2019' and the malicious URL. The presence of many external PDF links suggests a link farm or redirection scheme designed to 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.cc/pify?keyword=cg+love+status+video+2019
    • http://files.serenitypsy.com/uploads/1/3/0/8/130874031/4433477.pdf
    • http://files.sagharborflorist.net/uploads/1/3/0/9/130969731/tafufirivisazobujeg.pdf
    • http://files.rockheightsvacationrental.com/uploads/1/3/1/3/131379099/bawesokusobaler-wagob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5797/0328/files/pokulibotutiguzamazi.pdf
    • https://cdn.shopify.com/s/files/1/0436/8783/7849/files/advanced_vocabulary_synonyms.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jidaxuno.pdf
    • https://cdn.shopify.com/s/files/1/0445/4688/3748/files/cielo_lio_2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/17673888067.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/10798489223.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1644/files/8793781368.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91146339154.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/36723574102.pdf
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/5199468324.pdf
    • https://cdn.shopify.com/s/files/1/0432/8282/5376/files/belajar_gitar_blues.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruwisosipopiwusanitilowaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/classroom_english_vocabulary.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_off00004e09.bin
f4be08956ae5637af6d8e55bf2683db413058fd2e4c0811ed081044fc75c87b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E09 5344 bytes
font_01_sfnt_off00006056.bin
d8beefc7b191a86c57480482f3bee2e042357db48ee415616dc51bf4c07bf34b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6056 9644 bytes