Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0272920c515585…

MALICIOUS

PDF

48.4 KB Created: 2020-09-02 08:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d7f5b8d224c99cf455e4e3ad07d5087 SHA-1: 5a0d4b63f6e3238f6ea5ee2fb946de95c656ed9b SHA-256: 0b0272920c51558542daa9d090a0aea160c51fb8d6ee646dd28d7e2f32a8daeb
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 a redirector service. The primary malicious URL identified is https://ttraff.link/pify?keyword=camera+angles+shots+and+movements+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise its malicious nature. The ML classifier strongly indicated maliciousness, supporting the heuristic findings.

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.link/pify?keyword=camera+angles+shots+and+movements+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/96bf9d_c35871ed18f4422d96d3a1db20a73bbc.pdf
    • https://static.usrfiles.com/ugd/ae059d_b29f694e0ab445fcb4c18520a969b8dc.pdf
    • https://static.usrfiles.com/ugd/1849a1_691c59999051446eaf5aa2e52d4c9623.pdf
    • https://static.usrfiles.com/ugd/2074c9_76231dcf25704f049085b10e5b0c3ff8.pdf
    • https://static.usrfiles.com/ugd/fb83f1_4525f73d02784882bf7938c0e529d4b3.pdf
    • https://static.usrfiles.com/ugd/3b47cb_871638e079db44e4a5992df76466cb12.pdf
    • https://static.usrfiles.com/ugd/5e8de6_d6c9cb2fae864be98ee7ea98a8721a26.pdf
    • https://cdn.shopify.com/s/files/1/0434/0491/8941/files/vubeb.pdf
    • https://cdn.shopify.com/s/files/1/0472/3313/8853/files/contrato_de_renta_de_casa_en_texas.pdf
    • https://cdn.shopify.com/s/files/1/0446/4974/2499/files/javascript_docstring_format.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/bu_time_table_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/3876/8294/files/rinegigul.pdf
    • https://cdn.shopify.com/s/files/1/0432/9730/8840/files/53163380188.pdf
    • https://cdn.shopify.com/s/files/1/0434/9558/8002/files/6908884358.pdf
    • https://cdn.shopify.com/s/files/1/0430/8176/0935/files/moriwugetepudabujawixira.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_off00007fc3.bin
2aa5bee2cdba757a0cf164bfe684c4284aa31a41fb5b70c115f229d20f00b14e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC3 5420 bytes
font_01_sfnt_off0000920c.bin
5bad510648f329c60366f9ef0d3c7c260ccc6e30c13d47def7d141da7b823459		 pdf-font-stream PDF embedded font (sfnt) at offset 0x920C 10164 bytes

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