Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b5179ec313e419…

MALICIOUS

PDF

47.7 KB Created: 2020-08-08 10:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79dc65ed0efc4a0bee3c262171be5a6e SHA-1: 401f3531f773bf91cb3c26e25c931e848f1ee3d7 SHA-256: 80b5179ec313e4193b051306ceacd6f7a12cc9c5d502b743d299306672e1b3f1
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at `ttraff.ru`. The document body, though partially corrupted, includes the same URL and mentions a 'business intelligence pdf tutorial', suggesting a lure. The presence of many external PDF links indicates a link farm, likely for SEO poisoning or to obscure malicious destinations.

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/pify?keyword=business+intelligence+pdf+tutorial
    • http://jajuxeror.ophistorical.org/uploads/1/3/1/0/131070374/a555796a860.pdf
    • http://wufaw.talltaleswithpoppynwosu.com/uploads/1/3/1/4/131453177/fumapa-rezojavopugi.pdf
    • http://files.palmislandestates.org/uploads/1/3/1/3/131383398/luveme_vulube_roxobor_warosim.pdf
    • http://files.holistichealthactivation.com/uploads/1/3/0/7/130775949/54760bc7893880a.pdf
    • http://files.ashbournelions.com/uploads/1/3/1/4/131453067/felevepidup_wamixuwogaxulub_zodagokamufite.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/13554219191.pdf
    • https://cdn.shopify.com/s/files/1/0435/6535/1071/files/ajax_full_tutorial_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/6138/6147/files/nelax.pdf
    • https://cdn.shopify.com/s/files/1/0435/5129/3603/files/what_font_is_discord.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gokibaleginasesomedusuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/binary_tree_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2523/files/20148640078.pdf
    • https://cdn.shopify.com/s/files/1/0434/1153/8072/files/96_seadoo_xp.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/advanced_reading_skills.pdf
    • https://cdn.shopify.com/s/files/1/0431/0397/7634/files/guitar_neck_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0431/2878/3002/files/lutotagix.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/96_lincoln_town_car.pdf
    • https://cdn.shopify.com/s/files/1/0433/8951/7973/files/japutokumaxejijorewagikew.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e8b.bin
4e239a098988be7dded8b2b512886ec20b6f65b556e7424b7fef3915d89df6a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8B 5256 bytes
font_01_sfnt_off00008070.bin
9505416256e49d816a814562dbb2baa7139203d408142ed0da5aca62cf6b33a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8070 10128 bytes
font_02_sfnt_off0000a30b.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA30B 4324 bytes

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