Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22cc4c48ce7846c…

MALICIOUS

PDF

35.2 KB Created: 2020-10-15 16:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 59c6e9a376b26fd2964d1c6c3f6ddf45 SHA-1: ca04eebe829419b59216c1f14e198e5dac6c145c SHA-256: a22cc4c48ce7846c6df49a6b6369109787bf6f947fd84727eca46b33c0bdd47a
184 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to disposable hosting, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains references to 'wipeout 1 game apk' and URLs that suggest a link farm designed to attract users with search engine optimization tactics. This indicates an attempt to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?keyword=wipeout+1+game+apk In PDF document text
    • https://site-1044292.mozfiles.com/files/1044292/75948211215.pdfIn PDF document text
    • https://site-1044010.mozfiles.com/files/1044010/4201455152.pdfIn PDF document text
    • https://site-1039646.mozfiles.com/files/1039646/70142182117.pdfIn PDF document text
    • https://site-1043650.mozfiles.com/files/1043650/71188181742.pdfIn PDF document text
    • https://site-1041498.mozfiles.com/files/1041498/19066017096.pdfIn PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/guwakajuwugokatodot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f86fc7b0ec9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f871fbbcad19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f86f9dd5940a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f8802d5e3cb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f873e9d7aead.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f86f9c01e1ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_5f87857a649f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f8777602b6ff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6929/0149/files/suxatirubumagifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/98328460485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4301/2256/files/chemistry_dictionary_english_to_gujarati_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0193/2706/files/alchemist_code_jp_tier_list_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/87550846385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1267/5995/files/3d_name_wallpaper_creator_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6209/4741/files/93288920677.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB6 4964 bytes
SHA-256: afd90fe44a25f10056ccf0bee685275356ddd18a57a7634876979e35effe5eba
font_01_sfnt_off00005dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAB 10048 bytes
SHA-256: 532058d27d84daa8c4c3eb739fb4504b6a2e118a85bdd43f866c0fd05fe536b5