Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e62a7e0bc3c8f8…

MALICIOUS

PDF

33.2 KB Created: 2020-09-02 11:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4735b398310e586336e00a6128c3974 SHA-1: 7a1c45fcbd353bcb1dc4a3cec587e8a7f2225ba1 SHA-256: 36e62a7e0bc3c8f889f9b6c9152596073828e6916dcf757a9ff94401f9621c99
150 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a redirector service. The document body suggests a lure related to 'quiz answers', likely intended to trick users into clicking the malicious links. The primary malicious URL identified is ttraff.com, which is known to host redirectors. The PDF also contains a link farm, indicating a potential SEO poisoning or traffic generation scheme.

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.com/wix?keyword=go+transcript+new+quiz+answers
    • https://cdn.shopify.com/s/files/1/0457/7037/5324/files/gba_emulator_android_full_apk.pdf
    • https://cdn.shopify.com/s/files/1/0436/9226/1529/files/sowezosol.pdf
    • https://cdn.shopify.com/s/files/1/0434/9070/5573/files/2310432256.pdf
    • https://cdn.shopify.com/s/files/1/0429/2512/9894/files/93463788307.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6971/files/simplemente_enamorados_mary_balogh_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0435/9671/0050/files/vazerirupumilomeragonos.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/posapumofov.pdf
    • https://cdn.shopify.com/s/files/1/0429/9092/8026/files/xodagemejuwekuzuxajebune.pdf
    • https://cdn.shopify.com/s/files/1/0429/2696/4903/files/autonomic_nervous_system_pharmacology.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/download_toad_for_oracle_11g_64_bit_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/olevia_television_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6619/files/jegewoluvovexosikenin.pdf
    • https://cdn.shopify.com/s/files/1/0429/6130/5756/files/cast_lg_tv_android.pdf
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/stock_market_trading_tutorial_for_beginners.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_off0000454c.bin
ecef7b0fb06f764ed66891f1f9799e4d01e85ca8cd1ebf37737fc168a2f0a595		 pdf-font-stream PDF embedded font (sfnt) at offset 0x454C 5196 bytes
font_01_sfnt_off00005727.bin
ae9072e6ed8e823c9fe1641ff269d6da21cb7955ff1479d6a41eda95d9f1efff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5727 9696 bytes

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