Malicious PDF — malware analysis report

Static analysis result for SHA-256 6676cb1853701c7c…

MALICIOUS

PDF

39.7 KB Created: 2020-08-17 02:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e5985baec70ad1c0ec968b0d15606f8 SHA-1: e201500c4fc13a3e4e2f989fb03bc265793acd74 SHA-256: 6676cb1853701c7c01d438038d2431f47db29c388ba866d4263404d70258b746
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a redirector infrastructure, specifically advertising a game mod download. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the primary URL. The document body, though heavily obfuscated, contains references to the game mod and the redirector URL, suggesting a lure to download potentially malicious content. No scripts were extracted, but the presence of multiple external links points to a link farm or redirection scheme.

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.com/pify?keyword=barangay+143+street+league+mod+apk
    • http://files.dollarcannulaclub.com/uploads/1/3/1/4/131437632/vuzunu.pdf
    • http://files.driftlessloop.com/uploads/1/3/1/4/131453536/4962333.pdf
    • http://files.uuffpspacecoast.org/uploads/1/3/0/9/130970004/tonurikem.pdf
    • http://sigoju.sunnibunni.com/uploads/1/3/1/8/131871721/tuzowazupik-xebapivuk-zonoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/xajexuragelilomaxita.pdf
    • https://cdn.shopify.com/s/files/1/0431/3972/7509/files/fagofekupigajabuki.pdf
    • https://cdn.shopify.com/s/files/1/0431/3687/6695/files/38633398731.pdf
    • https://cdn.shopify.com/s/files/1/0440/6378/5112/files/gigurumewazawimemafitepas.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/kabuliwala_story_in_english_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/4916/2654/files/polar_92_emc_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9177/9999/files/99320237696.pdf
    • https://cdn.shopify.com/s/files/1/0428/4035/9068/files/pawejatogiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/3536/8346/files/xivelutulusopasevopomu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/mabavifoja.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_off00005bc4.bin
7aa4ff9a0ab6267b492692f29187fe62b52f8da54cd2a57d294b0eba8a97fb47
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC4 5796 bytes
font_01_sfnt_off00006f79.bin
de5dafe8c703b4e8dc2cd747cc8700ce26dbfa0d57c1e3f78419f00e4036e21b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F79 10360 bytes