Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b142e9d4d772af…

MALICIOUS

PDF

38.9 KB Created: 2020-08-30 00:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17824cf6459ac9c848b6b499854a7ce5 SHA-1: 169e341624be38b3e96ddb08a96312f7af6040c2 SHA-256: f2b142e9d4d772af9d137926c086f3afd7a11d90aa9223994268f96734e937a8
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a URL associated with malicious redirector infrastructure, specifically designed to lure users with keywords like 'hindi full movie boss download'. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links, many pointing to Shopify domains, suggests a link farm used for SEO poisoning or distributing malicious content. The document body, though heavily obfuscated, contains the same lure text and the malicious URL.

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.club/wix?keyword=hindi+full+movie+boss+download
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/wejowurefeguzug.pdf
    • https://cdn.shopify.com/s/files/1/0432/3423/0429/files/97696159012.pdf
    • https://cdn.shopify.com/s/files/1/0433/0763/0747/files/binary_decimal_octal_hexadecimal_number_system.pdf
    • https://cdn.shopify.com/s/files/1/0428/8384/2215/files/kixulomasovusoxorudur.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/pengertian_cacar_air.pdf
    • https://cdn.shopify.com/s/files/1/0461/5189/3155/files/vidya_sinha_photo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6465/3984/files/latest_ant_contrib_jar.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/76327260086.pdf
    • https://static.usrfiles.com/ugd/a4e402_fd784d8c9072404a9d091da4953045f1.pdf
    • https://static.usrfiles.com/ugd/ba3095_c0f902fd54be4b68a8406c81e132cc5e.pdf
    • https://static.usrfiles.com/ugd/55cc32_76bd64ce2bf74014aeea46e292d0383e.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/zinugaleleluliwafexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3257/files/32234281191.pdf
    • https://cdn.shopify.com/s/files/1/0433/4744/3865/files/vijojulategikunod.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005aa4.bin
d2f60466696a387939b6094b34cacb7318a980aa1e7fb019f8b0cf6d01dc7e1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA4 5208 bytes
font_01_sfnt_off00006c55.bin
f90955e9883ad306aa1462606339ac13c9e4437c4178b693239b1e9fb25c0747
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C55 10192 bytes