Malicious PDF — malware analysis report

Static analysis result for SHA-256 db2400a9cb8c313c…

MALICIOUS

PDF

43.5 KB Created: 2020-08-23 20:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7602b0e3cc5a4e8f0f16155fa775ffc SHA-1: 04cc199d4fc23959d96261c9984e51ffbd2e5875 SHA-256: db2400a9cb8c313c86c6809e073c76a390e3475fa38864d108c015def4ab8742
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body text, though partially corrupted, contains the phrase 'Comparable crossword answer' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of multiple embedded links and the malicious redirector indicates a link farm or SEO poisoning attack designed to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=comparable+crossword+answer
    • http://sazajek.beingasunflower.org/uploads/1/3/1/8/131856935/d6d43d3c8.pdf
    • http://gemepif.580mercantile.net/uploads/1/3/0/7/130739113/goruzisewozeluk-telinamupukufi-lezup-sofuxekixapodaf.pdf
    • http://files.micahmcgivern.com/uploads/1/3/2/6/132681144/zixolekarane.pdf
    • https://cdn.shopify.com/s/files/1/0437/7526/2869/files/piwag.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1362/files/yearly_calendar_template_one_page.pdf
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/bepolivik.pdf
    • https://cdn.shopify.com/s/files/1/0448/4320/4765/files/memorex_cd_lablemaker.pdf
    • https://cdn.shopify.com/s/files/1/0435/4162/7029/files/54258125391.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/jofomobiwepumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1149/files/a_song_of_ice_and_fire_rpg.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/risosovitajobuwifu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0352/5794/files/april_2020_current_affairs_bankers_adda.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8364/files/mutazikofuvozisaxub.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c65.bin
7f919e54d3a9ac9accbf1a7dbf0296470148b72e6a764f1bbfb86a2204735035		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C65 5356 bytes
font_01_sfnt_off00007e80.bin
ad83c016f6bc8dc6eaa115c94296090b9dc4a9e0b3ed7b8e6d4d257632cde8be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E80 10340 bytes

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