Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9e3f7e2ecf0c35…

MALICIOUS

PDF

48.1 KB Created: 2020-08-09 16:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 800c73597ceda8499baf34b0dcb705b8 SHA-1: ff3202c03da97838d8f8404b0fa17c91ebe7bc3d SHA-256: 5e9e3f7e2ecf0c356dd0ab44601980e1432ab31c0990b0418f04b3d5ef32d135
174 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.cc/pify?keyword=agonist+and+antagonist+drugs+pdf. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to drug information, likely intended to trick users into clicking the malicious link. No scripts were extracted, but the presence of embedded URLs and the redirector link strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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.cc/pify?keyword=agonist+and+antagonist+drugs+pdf
    • http://files.ethanhamby.com/uploads/1/3/1/0/131070604/e400607bf54e4f.pdf
    • http://gitelijep.faithtabernaclefellowship.org/uploads/1/3/1/0/131071164/siwitebolupew.pdf
    • http://files.flimatranslations.com/uploads/1/3/1/6/131606262/9864b75a2ec.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/4231/4152/files/botany_notes_for_bsc_2nd_year.pdf
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/aprender_a_tocar_guitarra_muy_completo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9409/8598/files/79017894071.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/86837888.pdf
    • https://cdn.shopify.com/s/files/1/0431/2222/9397/files/91114171552.pdf
    • https://cdn.shopify.com/s/files/1/0427/5548/9948/files/50942809315.pdf
    • https://cdn.shopify.com/s/files/1/0431/3471/4017/files/borchert_encyclopedia_of_philosophy.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4737/files/google_sheets_alphabetize.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/55885725484.pdf
    • https://cdn.shopify.com/s/files/1/0428/7306/1532/files/babiwivuvax.pdf
    • https://cdn.shopify.com/s/files/1/0440/0575/2997/files/normes_aaoifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4769/0145/files/tezovuzakotefi.pdf
    • https://cdn.shopify.com/s/files/1/0448/4608/8349/files/slow_steam_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/39444645607.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_off0000793b.bin
13f764c6440ff783787bb61e6f8db4f6722f248db082299c097f07b8523bd797		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793B 5164 bytes
font_01_sfnt_off00008ade.bin
d11518d1e3a4ee7999553ffe80da702691b3f600bd8e51c16dcba83511683658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADE 12844 bytes

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