Malicious PDF — malware analysis report

Static analysis result for SHA-256 168d041a1021a1ab…

MALICIOUS

PDF

41.3 KB Created: 2020-08-14 18:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b33398d0501cfa5b1f76a5da1e43256 SHA-1: 8f055cccfb896c08fca4d52432482f06fa9e2ed4 SHA-256: 168d041a1021a1ab3019ba789168f3bb141ae390ae524057f6eada1c8bcd5c07
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a document download, which redirects to a malicious URL. The document body and embedded links suggest a phishing or scam attempt to trick users into visiting the malicious redirector. No scripts were extracted, but the PDF structure and embedded links are indicative 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.com/wb?keyword=marisa%20peer%20i%20am%20enough%20pdf%20download
    • http://files.andrewdosshistory.com/uploads/1/3/2/6/132682640/nesiviwetax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/wezajavupavobopopurotako.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/63477079925.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/dagoxulotop.pdf
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/bedegasijeve.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2336/files/62657776324.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8554/files/36996838228.pdf
    • https://cdn.shopify.com/s/files/1/0437/9135/1969/files/nagijinujuxugapilib.pdf
    • https://cdn.shopify.com/s/files/1/0430/6187/0743/files/zurosuwosovokirilufukawa.pdf
    • https://cdn.shopify.com/s/files/1/0438/3395/0370/files/63402410578.pdf
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/meteorological_instruments.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/43028811041.pdf
    • https://cdn.shopify.com/s/files/1/0438/3545/7696/files/70050710696.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_off00006286.bin
f5106b8f9633a02327a22b3d5675cb4cf680283179a931c11142fd96b0796cd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6286 5552 bytes
font_01_sfnt_off00007550.bin
8ebc09341f6c4717c6c40477550d998c1689e044ba50c8878c748b02b4153afe
pdf-font-stream PDF embedded font (sfnt) at offset 0x7550 10284 bytes