Malicious PDF — malware analysis report

Static analysis result for SHA-256 84fdfebb6ebe9d9d…

MALICIOUS

PDF

48.3 KB Created: 2020-08-23 19:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7aba87d3fa92de4014a71b79711e8b5 SHA-1: c06ba0e1f7c7c5d67bc641349d42e5d55e246cfa SHA-256: 84fdfebb6ebe9d9dbb2cf76a6c94a604377e437c5dcf20e9df6e4143806a277e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many of which point to a link farm designed to redirect users to potentially malicious content. The primary redirector URL, 'https://ttraff.ru/pify?keyword=chunks+movie+malayalam', suggests a lure related to movie content. The ML classifier strongly indicated maliciousness, and the presence of a link farm is a common tactic for distributing malware or phishing pages.

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=chunks+movie+malayalam
    • http://jebuwupo.bingsdsm.com/uploads/1/3/1/3/131383791/61896f662d.pdf
    • http://files.johnathonqswanson.com/uploads/1/3/1/6/131607805/6057483.pdf
    • https://cdn.shopify.com/s/files/1/0438/1409/2960/files/87208941518.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/24900910985.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/davidson_county_nc_arrest_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/8220/2782/files/rexawadibun.pdf
    • https://cdn.shopify.com/s/files/1/0431/6558/1468/files/1930857169.pdf
    • https://cdn.shopify.com/s/files/1/0439/2045/7883/files/arduino_nano_driver_ch340.pdf
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/45535465972.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7224/files/normas_da_abnt_para_referencias_bibliograficas.pdf
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/zademavipisutezabe.pdf
    • https://cdn.shopify.com/s/files/1/0440/2036/7510/files/96881613796.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/language_arts_worksheet_6th_grade.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000063e1.bin
ad8bea1c450513ba9252c625497ad491994455b3577adc3958f877397eefd247		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x63E1 6748 bytes
font_00_sfnt_off00005332.bin
4812b0fb2e0eff4b683c87d7431a4aede556520111bb8557a3e7093858421a7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5332 4960 bytes
font_02_sfnt_off00007b16.bin
a2932642a37e6057207ca49373360a3d0434c541727ab916564e20726d2bb64f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B16 10272 bytes
font_03_sfnt_off00009e73.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E73 16164 bytes

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