Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f439d52338110d5…

MALICIOUS

PDF

36.1 KB Created: 2020-08-23 09:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f0f7fff3b5a7c2fb49baa45c6ba9b4b SHA-1: d1467d012397a995ac5753d51e8514539c3d5417 SHA-256: 7f439d52338110d5c45b31cbc5cc7369764317440c5c353474c3ea4791077287
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to phishing sites or malware downloads. The document body, though obfuscated, contains the same URL, suggesting an intent to trick the user into clicking it. The presence of numerous other PDF links, many pointing to benign Shopify domains, indicates a link farm strategy to improve SEO for the malicious redirector.

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=drunken+master+imdb+parents+guide
    • http://files.samm-invest.com/uploads/1/3/1/3/131379014/muvakezataxeviripa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/12590121091.pdf
    • https://cdn.shopify.com/s/files/1/0435/9657/8979/files/class_11th_ncert_biology_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3679/3237/files/98397372934.pdf
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/kugobom.pdf
    • https://cdn.shopify.com/s/files/1/0434/5672/5159/files/98459357155.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/dezanaj.pdf
    • https://cdn.shopify.com/s/files/1/0440/2289/0661/files/format_sd_card_ubuntu_command.pdf
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/design_sprint_livro.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/definition_of_limits_in_calculus.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_off00004c7c.bin
204a7bded342ec22416cc05dbcefb3d5bef905d3a34fba3cc03902feba9b9cbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C7C 5448 bytes
font_01_sfnt_off00005ee1.bin
325b03dfa72ed6b1c2ddc48218789e1fdaef64c41dbbfa4f13d4d940b01985c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE1 10848 bytes