Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fdb4a6c3ab17acc…

MALICIOUS

PDF

40.2 KB Created: 2020-08-19 08:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 716e98d0daf28f9b080f6a9f2c416ade SHA-1: 2d2d7c4124d332d54c5f1ae82cb3335b6666020f SHA-256: 5fdb4a6c3ab17acc93c713dfc8af9045a42fd6860c0caf6d2378d7b513a660e9
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a redirector. The primary malicious link directs users to 'ttraff.com', suggesting a phishing or scam attempt. The document's content and structure indicate it's designed to trick users into clicking these links, likely leading to further malicious content or exploitation.

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=br%25C3%25BCche+%25C3%25BCbungsaufgaben+pdf
    • http://files.yogawithminta.com/uploads/1/3/2/7/132710748/2190998.pdf
    • http://muvaxiji.aasvehiclesolutions.co.uk/uploads/1/3/1/3/131398101/a7d1d5be51631aa.pdf
    • http://xuduvano.travelmittelamerika.com/uploads/1/3/1/3/131380429/gumamudebupaxuwevewi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34007792176.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/wefugasolinedaraf.pdf
    • https://cdn.shopify.com/s/files/1/0432/7407/6315/files/popunuzajifireluvo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0258/3449/files/sobupowu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3307/files/22572985134.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/woxopuwibokedekas.pdf
    • https://cdn.shopify.com/s/files/1/0447/9234/8838/files/51176430232.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/81833822615.pdf
    • https://cdn.shopify.com/s/files/1/0429/8116/3157/files/xejebikuzutudukoxevemi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/child_development_a_thematic_approach.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8695/files/vonuvefapifepesabonopesa.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_off00005b7d.bin
53de51760a859cbd3752e589f8cf5d1c5e67f0e1c5703726eb6faab944271108
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7D 5692 bytes
font_01_sfnt_off00006e9f.bin
eb107eb24a6e5301d769882764a71dbce6d1b722391d7a1ba666fd9f1c2b28ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9F 10876 bytes