Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b957c7008ab69eb…

MALICIOUS

PDF

45.9 KB Created: 2020-08-21 07:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e940a0b9a5b285efce9b9aa5ed5554f8 SHA-1: 53f7b85b30a4dcfb0c3655beb9c3c53b1b7dd404 SHA-256: 6b957c7008ab69eb30825bda5f8d47200d5e561235734558b5d95e491db9a43d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to appear as a user manual, but it redirects to malicious infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=user+manual+for+samsung+a20+mobile+phone. The document's structure and embedded links suggest a phishing or redirection attempt to a 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/pify?keyword=user+manual+for+samsung+a20+mobile+phone
    • http://files.adamthibert.com/uploads/1/3/0/7/130775959/6680358.pdf
    • http://files.williampeskett.com/uploads/1/3/0/8/130814868/0aa1753039.pdf
    • http://files.sexintheplantworld.com/uploads/1/3/1/6/131606335/pokikidutatafu_tabazov.pdf
    • http://kezowuji.melissalamoureuxlmft.com/uploads/1/3/1/4/131453872/bb8f3ac3152.pdf
    • http://files.jacqulynjanna.com/uploads/1/3/0/7/130776516/doxenesagatan-lixoxadufana.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/7328/7830/files/7032284854.pdf
    • https://cdn.shopify.com/s/files/1/0428/7873/0403/files/backup_bookmarks_firefox.pdf
    • https://cdn.shopify.com/s/files/1/0430/6327/9767/files/achilles_tang_care_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/6895/4526/files/sbp_config_for_fallout_4.pdf
    • https://cdn.shopify.com/s/files/1/0428/8312/1319/files/vexisibasejop.pdf
    • https://cdn.shopify.com/s/files/1/0437/6346/6391/files/simple_python_programs_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7351/files/statutory_auditor_appointment_letter_format_in_word.pdf
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/mujogisemunojezus.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/fadigubejuvuxenuwagukew.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6822/files/94985774880.pdf
    • https://cdn.shopify.com/s/files/1/0428/9160/8227/files/livro_carry_on_em.pdf
    • https://cdn.shopify.com/s/files/1/0438/2529/9613/files/mifur.pdf
    • https://cdn.shopify.com/s/files/1/0438/8818/1400/files/tolivuxikoxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3881/0010/files/poweporep.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_off0000640b.bin
b64350c7bbdab9a8dc064f21a0594747627629593141b2bb6cd02da97e11ebda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640B 3724 bytes
font_01_sfnt_off00007149.bin
ef4074bd8a3e47be591e5dfa5ed8da6e88a8826b066c8b072f5ebc2e7297eabf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7149 5720 bytes
font_02_sfnt_off0000848a.bin
84caacf80473449ef775b0bb10fe8a4bb348eaa43b6f99a78bfc9eba43b2385a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x848A 10852 bytes

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