Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d184b66398e80d2…

MALICIOUS

PDF

40.8 KB Created: 2020-08-22 19:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c4d559a4098915c8d96936128f66b05 SHA-1: 34899f019665e17fbcc895907e62f37bbcfffa70 SHA-256: 6d184b66398e80d2509508d4f0c41cb50ef7fc07ee1814a8bcf36e5b13793f44
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, https://ttraff.cc/pify?keyword=sony+android+tv+update+april+2019, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to a 'Sony android tv update' and the malicious URL, suggesting a lure for users to click the link. The ML classifier strongly indicates maliciousness.

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.cc/pify?keyword=sony+android+tv+update+april+2019
    • http://files.mysuisselife.com/uploads/1/3/1/4/131453897/2dcb467cb5b.pdf
    • http://files.sobremesasmag.org/uploads/1/3/1/8/131856257/3b3b3fb.pdf
    • http://tisiru.babydollsheepaustralia.com/uploads/1/3/0/7/130738799/e206963b260438.pdf
    • http://files.pinwellbooks.co.uk/uploads/1/3/0/7/130775357/tukabolu_nifadisogujufa_rujeku_wuzuzovuzifixob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1964/0738/files/77995315563.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3508/files/22018584789.pdf
    • https://cdn.shopify.com/s/files/1/0432/6260/7520/files/zajitepekotem.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7668/files/biological_anthropology_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/rikikowevikipujumitinoj.pdf
    • https://cdn.shopify.com/s/files/1/0439/4611/5230/files/uscg_aux_service_dress_blue_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27247465441.pdf
    • https://cdn.shopify.com/s/files/1/0441/0913/6024/files/xifemokoboxizefoxejekev.pdf
    • https://cdn.shopify.com/s/files/1/0430/5181/0969/files/33524763964.pdf
    • https://cdn.shopify.com/s/files/1/0437/5222/6974/files/zimojazax.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_off00006014.bin
ef2ab8d15d6f56c1c927f0a3fb91ac56ef907225fcaf75b96c5c1a1c123e294e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6014 5520 bytes
font_01_sfnt_off000072fe.bin
851cd4f383292bae0887a275669834e4ad97a60623423c975dd4a3a3f8f80ed3
pdf-font-stream PDF embedded font (sfnt) at offset 0x72FE 10296 bytes