Malicious PDF — malware analysis report

Static analysis result for SHA-256 58d1334c2d4f7b7c…

MALICIOUS

PDF

52.2 KB Created: 2020-08-05 06:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9c7bd60cd477df252d114a994603fd5 SHA-1: 4823466f9beec1fe1c8e8e534c19323e79dd8b3a SHA-256: 58d1334c2d4f7b7c20e3499bf84cdf40927632cd36f43fdfb484e416205fff41
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a resource for 'entrepreneurship development'. The document also features a large number of external PDF links, many hosted on Shopify, likely for SEO manipulation to improve search engine ranking for malicious content. The ML classifier strongly indicates malicious intent.

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=entrepreneurship+development+pdf+2020
    • http://files.stephaniebien.com/uploads/1/3/0/9/130968934/9285435.pdf
    • http://files.shantellstricklanddavis.com/uploads/1/3/2/6/132695492/7880082.pdf
    • http://files.islaviolinecolodge.com/uploads/1/3/1/1/131163898/2925997.pdf
    • http://files.lovenirvanayoga.com/uploads/1/3/0/8/130874170/6558290.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/pabuwemozenodipo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1864/8732/files/geluwadubikonesomofe.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8816/files/pebibobarijidukidisorizez.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/material_ui_login_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8947/files/63488000143.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/12525184785.pdf
    • https://cdn.shopify.com/s/files/1/0433/5190/0310/files/saleduwovire.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2051/files/50459104281.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3006/files/gukixutejezagafabepasev.pdf
    • https://cdn.shopify.com/s/files/1/0432/8374/2884/files/easy_jazz_piano_songs.pdf
    • https://cdn.shopify.com/s/files/1/0450/8617/9480/files/mobius_aromaticity.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_off00008d7b.bin
6359bdb3e93764b71ff59adcfcdaa5a45c2bd1e487a434f7837dedc0647ae6b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D7B 5360 bytes
font_01_sfnt_off00009f9e.bin
81a341c44330e388fb4f8765d3eed4d43ba4919dcf851c7292c92ce95770b010		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F9E 10540 bytes

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