Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a273eb0e8a989b…

MALICIOUS

PDF

33.9 KB Created: 2020-08-31 02:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0063f7ab2655741daaedb8bf75b5993 SHA-1: 3cec4854cd60910da5a38bb0cb388f559e3d4baf SHA-256: 61a273eb0e8a989b054afa7d5acb53aaa09f302fccc4f54806600173252710e2
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.ru/wix?keyword=naruto+shippuden+ultimate+ninja+hero'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, including 'https://cdn.shopify.com/s/files/1/0428/7663/3247/files/electro_pneumatic_valves.pdf'. The ML classifier strongly indicates maliciousness, suggesting the document's primary purpose is to redirect users to harmful content.

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=naruto+shippuden+ultimate+ninja+hero
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7663/3247/files/electro_pneumatic_valves.pdf
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/road_edge_guide_post_spacing.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/komunuwejaxebilumugupas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9023/1974/files/lekujaxopuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4199/files/vubemurazuforigixusipere.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_bb8cf75a007047bdb80f0797be2027b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_022441e0a6994c79b7f1fd4cfe042bb1.pdf
    • https://static.usrfiles.com/ugd/764aaa_531eca46db984f7d91f482550268d118.pdf
    • https://static.usrfiles.com/ugd/12f4eb_241932fbf7ab49e4881be2bdfd675d27.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/pigapidekud.pdf
    • https://cdn.shopify.com/s/files/1/0437/0386/1416/files/managing_human_resources_16th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6938/files/39836145078.pdf
    • https://cdn.shopify.com/s/files/1/0434/6616/2341/files/nunoximewajomamezidi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8007/0808/files/danaraxizenelupunofabovad.pdf
    • https://cdn.shopify.com/s/files/1/0447/6711/7463/files/tamil_devotional_songs_lyrics_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0444/5192/2087/files/baldassare_castiglione_book_of_the_courtier.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_off00004690.bin
7adafb549eaf820c4f43a9c832bd42e18737f99a270a79e0d80cc693c8d44a99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4690 5244 bytes
font_01_sfnt_off00005839.bin
bded883acdd0da26aa19a65d136257041e82309bdab717284baf4d789dddebd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5839 10288 bytes

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