Malicious PDF — malware analysis report

Static analysis result for SHA-256 52637f48e8c2c62e…

MALICIOUS

PDF

54.1 KB Created: 2020-08-17 11:57:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f384ba8b7edb52ed7c2b66bfbc011507 SHA-1: e02e9533a86f2f268bf9bdf2aa6bcce8ac98f903 SHA-256: 52637f48e8c2c62e12153d8bcd7e1324644ba711b9dfff6957a1f15b4edbe2ab
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, specifically 'https://ttraff.cc/pify?keyword=canada+federal+election+candidates+platforms'. This URL is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to election candidates and the malicious URL, suggesting a phishing or scam attempt. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm designed to obscure the true malicious destination.

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.cc/pify?keyword=canada+federal+election+candidates+platforms
    • http://files.auntsadiesbnb.com/uploads/1/3/1/3/131378993/8612566.pdf
    • http://files.distinctmedia.ca/uploads/1/3/1/0/131071063/sejoja-nizinaripe-woros.pdf
    • https://cdn.shopify.com/s/files/1/0435/8363/5619/files/95755902699.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/84490423747.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1695/files/osrs_nature_spirit.pdf
    • https://cdn.shopify.com/s/files/1/0430/4371/7274/files/bosch_maxx_4_wfc_2020.pdf
    • https://cdn.shopify.com/s/files/1/0448/0499/7271/files/free_printable_calendars_october_2015.pdf
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/xerudegopazuj.pdf
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/60968492370.pdf
    • https://cdn.shopify.com/s/files/1/0435/2036/0600/files/cambiar_fuente_de_letra_android_sin_root.pdf
    • https://cdn.shopify.com/s/files/1/0431/8042/5370/files/ielts_score_sheet_example.pdf
    • https://cdn.shopify.com/s/files/1/0430/8477/5578/files/54979856570.pdf
    • https://cdn.shopify.com/s/files/1/0437/8614/1847/files/73010271347.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/buvusifi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7557/files/8916387561.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_off000095c0.bin
4e0f2b47780445c1a2594a6a2b029dff6c74982e87fbb496cd44dc8aebd021ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x95C0 5208 bytes
font_01_sfnt_off0000a75c.bin
c942429eb33279d4e0e0789d383104a4667f5c853e17f191eb20e318a3d51f8d
pdf-font-stream PDF embedded font (sfnt) at offset 0xA75C 10444 bytes