Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e63d128c79e5082…

MALICIOUS

PDF

36.3 KB Created: 2020-09-03 06:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9558956f6b70d352e258e7cb8ab2bfa SHA-1: b57e06ab91109444ea42a9aa5cff1e1ef0b5cf75 SHA-256: 5e63d128c79e50828d21273781afa2b2281e44e06462edf89c1c79594ff260bc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm, with numerous links pointing to Shopify-hosted PDF files. The primary malicious URL identified is https://ttraff.ru/wix?keyword=logo+game+answers+pack+47. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to lure users to this malicious site.

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.ru/wix?keyword=logo+game+answers+pack+47
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1778/8830/files/the_deer_hunter_ptsd.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/difuxudixanadudopugup.pdf
    • https://cdn.shopify.com/s/files/1/0431/1321/8199/files/37867767526.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6721/files/naruto_apk_games_for_android_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/wonder_woman_full_movie_fzmovies.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0156/files/38257598277.pdf
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/kenudekoxaripo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7793/5004/files/ronogupekaviwafogudegimis.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/namebazul.pdf
    • https://static.usrfiles.com/ugd/e2f197_71571830bd184fbfb3a45af32f830a06.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_5e509b67f4a14c58b6cf68c3baf8fce1.pdf
    • https://cdn.shopify.com/s/files/1/0447/6341/4679/files/abbyy_finereader_sprint.pdf
    • https://cdn.shopify.com/s/files/1/0439/2812/5595/files/ranaxisarijejafusexameti.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7816/files/tisajofasukited.pdf
    • https://cdn.shopify.com/s/files/1/0439/4608/2472/files/bd_jsc_result_2018_with_marksheet.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_off00004dd4.bin
0d65b59a1cd2706d9eaf022a3b4bd10d26c56914f6fad54f0d1351ef63665ce7
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD4 5484 bytes
font_01_sfnt_off00006096.bin
7b9df03170048a1bb954d3e7478cc9b62cd1b57e2e608e83c09de12f70ab17be
pdf-font-stream PDF embedded font (sfnt) at offset 0x6096 10632 bytes