Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e77ea5547146e7…

MALICIOUS

PDF

43.0 KB Created: 2020-08-22 17:25:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8267bbb7ebca460a35732164873f13a9 SHA-1: 61434478820d5d3a7a72cf6e75d625ffd3a51ca9 SHA-256: 64e77ea5547146e73366555267858c9255f32bebcc70d64b0c201527a0eeed4d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass of external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing.

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/pify?keyword=double+sided+adhesive+sheets+for+cricut
    • http://files.catchabussouth.com/uploads/1/3/0/8/130813362/fesoketo-bedota-pefevif.pdf
    • http://files.letschangeourcity.org/uploads/1/3/1/4/131406086/0cb283.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/entrepreneurial_management.pdf
    • https://cdn.shopify.com/s/files/1/0434/5646/3014/files/63955472399.pdf
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/resistance_band_workout_plan.pdf
    • https://cdn.shopify.com/s/files/1/0430/8585/6919/files/neduwibemavijejiga.pdf
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/system_dynamics_palm_3rd_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5911/8229/files/3.pdf
    • https://cdn.shopify.com/s/files/1/0435/4995/0116/files/ginuxukurulipif.pdf
    • https://cdn.shopify.com/s/files/1/0431/3091/2934/files/vuxexef.pdf
    • https://cdn.shopify.com/s/files/1/0438/3863/6192/files/catalogo_avon_campaa_17_2020_argentina.pdf
    • https://cdn.shopify.com/s/files/1/0432/7240/5157/files/27345788045.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/numulodoriwezaninarez.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/60846202007.pdf
    • https://cdn.shopify.com/s/files/1/0438/2123/6381/files/52145066313.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_off00006658.bin
dda4098a629d43c20579b8cffacdd9ea4f5cf8053aad6d358c501591b888e77e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6658 5308 bytes
font_01_sfnt_off0000785b.bin
634f1153f1a2f040f6c4aabfeca97d47bdfaaedab1b46cea88353bc6064965b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x785B 11828 bytes