Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd77b3898ddce29c…

MALICIOUS

PDF

45.5 KB Created: 2020-08-22 04:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5cad3c77056eb848b5fa32a3799bc95 SHA-1: 964a30d783fbe6a402030d6b5128ab6e7d7aaa2b SHA-256: dd77b3898ddce29c77feaaa4bdb5f92059033ce39fd5ac8a1bce011bc308daca
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.cc/pify?keyword=ff14+astrologian+5.+0+guide', points to a known malicious redirector. The presence of numerous links, many hosted on Shopify, suggests an attempt to obscure the final malicious destination and potentially leverage SEO tactics for distribution. The ML classifier also strongly indicated maliciousness.

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=ff14+astrologian+5.+0+guide
    • http://fimobube.jlblsource.com/uploads/1/3/1/4/131453858/jukowegixomi-zimudizadugaf.pdf
    • http://files.alexagrambush.com/uploads/1/3/1/4/131406049/dodojodipon.pdf
    • https://cdn.shopify.com/s/files/1/0429/3387/8940/files/refimodifexonud.pdf
    • https://cdn.shopify.com/s/files/1/0435/1475/7288/files/28017239512.pdf
    • https://cdn.shopify.com/s/files/1/0432/6827/6384/files/sausage_party_for_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/6133/7494/files/loxaguzelemumodinedel.pdf
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/lithium_bromide_msds.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/47435131530.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/kukupitiru.pdf
    • https://cdn.shopify.com/s/files/1/0432/1620/8036/files/mn_dnr_stocking_reports_2019.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/wonozanibuwusuvopox.pdf
    • https://cdn.shopify.com/s/files/1/0437/2824/0794/files/rubilevojukasufewu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/80519534503.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_off00007368.bin
3feae03a767c6cdac7974021c1e754749def3c5f5e38a8fae48f8e32a93ffb42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7368 5468 bytes
font_01_sfnt_off0000861b.bin
b06b84af326f48552423259bc9e48f0405099bb6879de3ff1c4007ed0077fa54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x861B 10360 bytes

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