Malicious PDF — malware analysis report

Static analysis result for SHA-256 967e351dbf31f443…

MALICIOUS

PDF

43.7 KB Created: 2020-08-08 00:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4be9d3097703d650fa02b4488d27ade SHA-1: 83131c965e0da48b586cdd99b7a0a9ddd8ecfaab SHA-256: 967e351dbf31f4434c7c2979776b7f4e41cb8790a157899807102f4b645f082c
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious domain (ttraff.com). This indicates a likely attempt to distribute malicious content or conduct phishing by leveraging SEO techniques to make the PDF appear legitimate. The ML classifier also strongly flagged this PDF as malicious.

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=rectangular+prism+net+printable+pdf
    • http://files.deeperlifehuntsville.org/uploads/1/3/2/6/132681207/ca6fd51117d70.pdf
    • http://gejopade.plexgallery.com/uploads/1/3/1/4/131453060/vibanimuxikegikomu.pdf
    • http://files.henderson-mn.com/uploads/1/3/1/4/131438059/mujuzed.pdf
    • http://files.marianohenestrosa.com/uploads/1/3/1/4/131453194/3325329.pdf
    • https://cdn.shopify.com/s/files/1/0432/0080/7074/files/mugokijijigozizaxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/ganemar.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4399/files/rukovexufu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7016/7966/files/zemuwatovunakarunijomopel.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/luxuwubewizigewetiwizi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/tame_impala_currents_download.pdf
    • https://cdn.shopify.com/s/files/1/0450/6848/4758/files/waiting_for_the_barbarians_j._m._coetzee.pdf
    • https://cdn.shopify.com/s/files/1/0438/0190/3264/files/88748124578.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/the_sisters_of_mercy_this_corrosion.pdf
    • https://cdn.shopify.com/s/files/1/0431/3464/8482/files/41067982810.pdf
    • https://cdn.shopify.com/s/files/1/0439/9045/0334/files/vixabisag.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d18.bin
ea0421ce9ef2678b5e0db135dc46d1a92b45eb4b2472f68bc4d2d2132f9e73ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D18 5620 bytes
font_01_sfnt_off00008023.bin
2342409ea2b342c1ce6ce9361b40352787285fd8a10f15e58ffe6472ed581c79
pdf-font-stream PDF embedded font (sfnt) at offset 0x8023 9956 bytes