Malicious PDF — malware analysis report

Static analysis result for SHA-256 6228c798e708444f…

MALICIOUS

PDF

35.4 KB Created: 2020-08-04 15:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a7d095627cb11e6e02746fa773993d8 SHA-1: 1a901309ef14a30d692cd169a7ba4f5ee8f95dc7 SHA-256: 6228c798e708444fad2634f9ef0ae65d36aeda5c3e86b0b4c352b9e99501b536
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One prominent link, however, redirects to `ttraff.ru`, identified as malicious redirector infrastructure. This indicates the document's primary purpose is to drive traffic to malicious sites, likely for further exploitation or phishing. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/wb?keyword=principles%20of%20physical%20cosmology%20peebles%20pdf%20free%20download
    • http://files.robroymcfarland.com/uploads/1/3/1/3/131382113/639831.pdf
    • http://files.nancymaldonado.com/uploads/1/3/0/8/130874110/rafaruke_xujuxuwep.pdf
    • http://files.truthisstrangerthansciencefiction.org/uploads/1/3/0/7/130775025/2703800.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/manewuzefezun.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/nirasuje.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7308/files/49046712128.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/wefebanuzilifig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/how_to_draw_a_snowflake.pdf
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/cbp_physics_config.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/mulagesef.pdf
    • https://cdn.shopify.com/s/files/1/0434/8333/2772/files/beyonce_711_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/dufora.pdf
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/degepedozaramewufi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9298/2427/files/25276685054.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/neketedelixilite.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/muvubi.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_off00004ae8.bin
4a09c64cab29fd66e85ae8b02c1bf788d69dc5e7cec46a2540811134a7d2c5c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE8 5904 bytes
font_01_sfnt_off00005ee9.bin
6a40a44fafac41b0b0b61f1b756303607139c7a0bd74779d2270f1d088393e71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE9 9836 bytes

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