Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c5a3e1472a22f8f…

MALICIOUS

PDF

44.7 KB Created: 2020-08-08 18:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72bc29fe76a854ac45c659418a6b1c53 SHA-1: c4fa2398760632059a48c2a92b941ca526358320 SHA-256: 7c5a3e1472a22f8f917e5986976da330f835e4a2ea414e5e593fd06f321f0cc7
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to searching for PDF books and a URL that appears to be a redirector. This suggests a phishing or scam attempt to redirect users to malicious content. No scripts were extracted, limiting the analysis of direct payload execution.

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/pify?keyword=search+pdf+books+download
    • http://files.millerchitty.com/uploads/1/3/1/4/131436956/daa1cc26d4.pdf
    • http://files.costigancustompainting.com/uploads/1/3/1/6/131606128/a5866b.pdf
    • http://files.rebeccalynnphotography.net/uploads/1/3/0/8/130874518/4840188.pdf
    • http://files.mgeducation.net/uploads/1/3/0/8/130874067/juretalukimif.pdf
    • https://cdn.shopify.com/s/files/1/0434/6131/2676/files/wegebetavak.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/tutorial_camtasia_studio.pdf
    • https://cdn.shopify.com/s/files/1/0434/3575/3639/files/multivariate_t_distribution.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7679/files/besuzi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9736/6436/files/pipexokerezezek.pdf
    • https://cdn.shopify.com/s/files/1/0430/9860/3669/files/cenarion_circle_rep_vanilla.pdf
    • https://cdn.shopify.com/s/files/1/0429/7369/2063/files/interpreting_apocalyptic_literature.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/damufezeloge.pdf
    • https://cdn.shopify.com/s/files/1/0429/0494/4807/files/vuwoxuxefelipopekaxoxori.pdf
    • https://cdn.shopify.com/s/files/1/0432/5569/3470/files/43748440772.pdf
    • https://cdn.shopify.com/s/files/1/0430/9804/6621/files/52526833922.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/john_deere_214.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006303.bin
0b16d3caa29583164d9b9cf5774aaa342bc5f055a9fe6146e63a1430cbf8d1ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x6303 5304 bytes
font_01_sfnt_off000074fc.bin
28f2a87a0ee888ab03a1da22e60cd9d0f7e3d5e1d14706cc4ccf3c5371a40db6
pdf-font-stream PDF embedded font (sfnt) at offset 0x74FC 10244 bytes
font_02_sfnt_off00009809.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9809 4324 bytes