Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e2af7f7d648617…

MALICIOUS

PDF

63.8 KB Created: 2020-08-30 06:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d98edf3441109ad9024263a526af3459 SHA-1: c9b45b67495cd5357bed471c0429d3c0bc0e0ba7 SHA-256: b1e2af7f7d64861797510ac07cb628c42576adeb79815b7fc465694cf437b687
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/wix?keyword=wizarding+world+wand+quiz+answers'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on 'cdn.shopify.com'. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirect URL, suggesting the primary intent is to drive users to this malicious site.

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.club/wix?keyword=wizarding+world+wand+quiz+answers
    • https://cdn.shopify.com/s/files/1/0434/4214/3397/files/greedfall_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8596/3169/files/mavubigatunijunupirepefe.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/64626941621.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/kexudem.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3545/files/11016423290.pdf
    • https://static.usrfiles.com/ugd/b8c837_409c019efa9f4aa28a7a617c0d06b294.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d874fdff0444ab6a2898bc7ca32f4a5.pdf
    • https://static.usrfiles.com/ugd/b50c55_4f8824a2e256462783edbcc6b2edd760.pdf
    • https://static.usrfiles.com/ugd/b8c837_26b44f289cf9405e9b6eb01e7ceb64d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_d03c5b973cf44b979260c8ccfe8d9224.pdf
    • https://static.usrfiles.com/ugd/5ecadc_59e3af29e15a4707996c0f40071eb22f.pdf
    • https://static.usrfiles.com/ugd/b91566_58d830e5f81d42ca95c2fb57f4f9485c.pdf
    • https://cdn.shopify.com/s/files/1/0429/6710/5687/files/19054018877.pdf
    • https://cdn.shopify.com/s/files/1/0435/1793/5770/files/most_important_synonyms_and_antonyms_for_ssc_cgl.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_off0000bb96.bin
685f3ae3e92fc048e7f379fd84d78d8d964351736c63f0cabecbeea5f184b6ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB96 5272 bytes
font_01_sfnt_off0000cda6.bin
4c7b9298dbf8256838bc388b2f04592cd26f43a3cfd33ae219a5d41f6f044509
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA6 10800 bytes