Malicious PDF — malware analysis report

Static analysis result for SHA-256 669deb671ebea911…

MALICIOUS

PDF

60.5 KB Created: 2020-08-06 20:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2c02fd65ac7660bd59413ef84aa3fdd SHA-1: 62f8f445468b63b4f49779e135292cd5d0d5e4ec SHA-256: 669deb671ebea91134218aee941ceda0b8ecc9ddd4c39ef05415adcac398c3ae
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.cc/pify?keyword=journal+of+family+business+strategy+pdf, which is likely used to funnel victims to further malicious content. The document body itself is heavily obfuscated but contains references to the malicious URL and other benign-looking PDF links, suggesting a link farm or redirection tactic.

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=journal+of+family+business+strategy+pdf
    • http://files.rhythmresearchresources.net/uploads/1/3/1/6/131606127/gelizoxi-mevep-xuzumifam.pdf
    • http://files.kylesmithguitar.com/uploads/1/3/0/7/130776067/8112808.pdf
    • http://gaven.uniquelyyoursbygina.com/uploads/1/3/2/6/132680813/4658a227ab.pdf
    • http://files.skidayz.co/uploads/1/3/0/7/130776828/jukarutevavuwepetud.pdf
    • http://files.citynorasprings.com/uploads/1/3/1/1/131163898/tagujonez_zewoto_torebirodokemi_fufawimazapomew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/1524403692.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/ncoer_training_bullets.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5591/files/britax_boulevard_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8402/9854/files/14623780877.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/65550129054.pdf
    • https://cdn.shopify.com/s/files/1/0439/9860/9566/files/noginezegenubo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kurejala.pdf
    • https://cdn.shopify.com/s/files/1/0432/2633/3351/files/jixeteresegisarulajipuzo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/71955597927.pdf
    • https://cdn.shopify.com/s/files/1/0431/7541/1872/files/93181974422.pdf
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/rijoxoko.pdf
    • https://cdn.shopify.com/s/files/1/0436/9491/5738/files/31222949569.pdf
    • https://cdn.shopify.com/s/files/1/0434/4889/3606/files/96269408679.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72966212333.pdf
    • https://cdn.shopify.com/s/files/1/0448/4136/9761/files/nissan_almera_tino_owners_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a073.bin
f5337a96640d2b2dc77531c5fd0ae1791e5e36e98757c0b49b7634ca95c0d510		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA073 5476 bytes
font_01_sfnt_off0000b2fd.bin
52d84a408febd2c3ad39dc30bbc1d509bb523d976791129d506bc8e54d0cb6dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FD 10312 bytes
font_02_sfnt_off0000d62c.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD62C 4324 bytes

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