Malicious PDF — malware analysis report

Static analysis result for SHA-256 10751ef93396ffe2…

MALICIOUS

PDF

33.8 KB Created: 2020-08-14 13:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ec9131e109d8823ac01857a43d69287 SHA-1: 8ae1e55b52651d77ab792d81c0f2f98d297910bb SHA-256: 10751ef93396ffe25301c7edb2332ad0e5ffa76ccd2057620f3aa72efde9a970
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to obscure the final destination. The document body also contains this URL, suggesting an attempt to trick the user into clicking it. The presence of numerous other PDF links, many pointing to Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to host further payloads. The ML classifier strongly flagged this PDF as malicious.

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=caremark+prior+authorization+form+for+adderall
    • http://files.sportsgrouphawaii.com/uploads/1/3/1/6/131636990/9948949.pdf
    • http://kiludomi.orrvillebaptist.com/uploads/1/3/1/6/131606552/1938488.pdf
    • http://jamolijom.hdofficiants.com/uploads/1/3/1/4/131408738/sosaje_natodowinufif_sikumurupadibi_zezanazisi.pdf
    • http://files.wrenpaediatrics.com/uploads/1/3/0/7/130775735/zasuzufunuwopej_tikigezusorire.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3698/2944/files/la_vie_en_rose_uke.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/zone-_empire_comics.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/8997/files/82882305681.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6643/files/55905119768.pdf
    • https://cdn.shopify.com/s/files/1/0438/8211/9323/files/jiwadazixazonax.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9816/files/81720933956.pdf
    • https://cdn.shopify.com/s/files/1/0436/7355/1001/files/99_names_of_allah_in_urdu_translation_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/69645280113.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/metal_gear_solid_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6017/files/34144971785.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1025/files/catholic_daily_prayers.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/96717177760.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/zatozapuzusovapagojadufef.pdf
    • https://cdn.shopify.com/s/files/1/0435/2838/8767/files/93835437065.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_off00004a63.bin
ff5a6c5922ee1aab847120eb761dd7ae8bffe971248abb2778299e2dba3548de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A63 5120 bytes
font_01_sfnt_off00005bb3.bin
f0753e58b2279b7f37e17ef50598b63fce13cc2eda205d64aa0cfc3aab4f1b9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB3 8828 bytes

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