Malicious PDF — malware analysis report

Static analysis result for SHA-256 5df516b66c82dac2…

MALICIOUS

PDF

44.8 KB Created: 2020-08-31 23:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09100fb468df69b4b7c6b3814cea70f8 SHA-1: c91409c0f68cdd6e02f840257ced55f4478606e3 SHA-256: 5df516b66c82dac25677a3482eef9dca46bfb4f89290b21a546210758d208393
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is ttraff.ru, which is known for redirecting to malicious content. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a link farm or phishing attempt.

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.ru/wix?keyword=html5+form+align+center
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/jquery_contact_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2261/files/35930942734.pdf
    • https://cdn.shopify.com/s/files/1/0432/6909/5590/files/appendices_in_a_report_example.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/worksheet_on_carbon_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0437/5317/7237/files/crack_ableton_live_9_trial.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/97663122184.pdf
    • https://cdn.shopify.com/s/files/1/0434/3909/5973/files/91455205137.pdf
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/51278650043.pdf
    • https://static.usrfiles.com/ugd/f55bec_b26c02227be04e0c84afab8d1d47e626.pdf
    • https://static.usrfiles.com/ugd/0779a3_d71940ffceeb43fa849b7ec8b7a28374.pdf
    • https://static.usrfiles.com/ugd/99965f_b88ad9139b7a4460bd150a80412796c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_675826b6c0e14a5c887689b8dad0a5f5.pdf
    • https://static.usrfiles.com/ugd/6908d7_53acf3c068444605be5e9297b8290c1d.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6349/files/zuminofinonewojalamevarid.pdf
    • https://cdn.shopify.com/s/files/1/0434/4800/8866/files/dream_stock_photo_marisol.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_off0000635d.bin
552724ec26c6d3f29b015a0f1262c28e8aaeb94bee5b3ee1ac0551713a48c978
pdf-font-stream PDF embedded font (sfnt) at offset 0x635D 5108 bytes
font_01_sfnt_off000074ac.bin
aa86660e287e2271b0393d50eabec9ae7b979f38e54d9fdfe6c7b9e74db7a9a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x74AC 15572 bytes