Malicious PDF — malware analysis report

Static analysis result for SHA-256 7197dffb60fda9f5…

MALICIOUS

PDF

45.3 KB Created: 2020-08-16 16:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9970323b13b8ecba906b947bf35cbade SHA-1: b8dea81f9428d087d1a520427681ed1d46d32024 SHA-256: 7197dffb60fda9f52f32929031c0b15da6ed8fed19787e3ca3a918d440251b6b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure to copy and paste content into a shell, which is a common technique for executing malicious commands. It also embeds numerous links, including one to known malicious redirector infrastructure at https://ttraff.ru/pify. The ML classifier strongly indicated maliciousness, supporting the assessment of a malicious document designed to trick users into execution.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=md5+checksum+windows+7
    • http://files.canarellics.net/uploads/1/3/1/4/131407818/c24e71.pdf
    • http://danukor.gaelicsocietytoronto.com/uploads/1/3/0/9/130969808/koxebu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6112/5015/files/50974745947.pdf
    • https://cdn.shopify.com/s/files/1/0433/7916/3285/files/jepomesovugenofejeka.pdf
    • https://cdn.shopify.com/s/files/1/0435/6158/2741/files/academic_writing_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3820/files/category_theory_for_programmers_the_preface.pdf
    • https://cdn.shopify.com/s/files/1/0429/0281/4876/files/pogobubarimomegajajorul.pdf
    • https://cdn.shopify.com/s/files/1/0436/6693/1862/files/42069087159.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/adobe_audition_cs6_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4573/files/canticorum_jubilo_partitura.pdf
    • https://cdn.shopify.com/s/files/1/0433/5845/3918/files/30380525771.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/18825914304.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2692/files/sinogixinaluxaf.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_off00006545.bin
a1ac4b6c55c6800e033cf5e9dc278f688b5669761b5d621a169f8058eeea25df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6545 5008 bytes
font_01_sfnt_off00007645.bin
52662b52455356a76647c030375de3fe239417bb578057104266b648310b9788		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7645 10652 bytes
font_02_sfnt_off00009aaa.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AAA 4324 bytes

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