Malicious PDF — malware analysis report

Static analysis result for SHA-256 71bfcce3f4ab2537…

MALICIOUS

PDF

48.1 KB Created: 2020-08-21 15:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d9ee14bb7a3f837a403b00089e609ac SHA-1: ed919c5be0a1dec3c4084fbe868ca823a814a243 SHA-256: 71bfcce3f4ab2537fe3c4a5890154d65f7c23bc73da65ee7d0894fe3c7ee936c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to redirect the user to a malicious site. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely for SEO manipulation or to host further malicious content.

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=famous+espn+reporters
    • http://files.kathleenmercury.com/uploads/1/3/1/4/131406036/tijurut.pdf
    • http://files.rcmhistory9.com/uploads/1/3/1/8/131857199/mexilebas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4729/5898/files/tiwitozofa.pdf
    • https://cdn.shopify.com/s/files/1/0443/4988/2524/files/ffxiv_lore_book_2.pdf
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/advanced_transport_phenomena_leal.pdf
    • https://cdn.shopify.com/s/files/1/0434/4214/3397/files/border_radius_view_android.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9531/files/raxamonesuremedozuxarejud.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/rokafevefogefevexezizugo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0954/8188/files/tolefeninikovebedape.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/face_recognition_using_pca_algorithm.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_off0000808d.bin
b3c3cda5423bebf877aeb2eff43d21e8fe6d839e1b57a6fb4884624883d458d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x808D 4888 bytes
font_01_sfnt_off00009116.bin
124ae96ca2e9a2ba1f711b5f7487a9f88b979bfb0e8067f50187461110322e61
pdf-font-stream PDF embedded font (sfnt) at offset 0x9116 10120 bytes