Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e514f0a0a16e100…

MALICIOUS

PDF

44.0 KB Created: 2020-07-29 07:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca3add4072bd235d9e5484f9aef03f49 SHA-1: 7b37a0a5bc658b623f59ab8072fe8b4eecd7ed59 SHA-256: 3e514f0a0a16e10085cf2208b5b8ba587f193236ec4f565a49e1ecde03b3a0b5
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with at least one pointing to a known malicious redirector infrastructure (ttraff.ru). The document body, though heavily obfuscated, suggests a lure related to the 'Us healthcare industry report'. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, indicates a link farm designed to distribute traffic to potentially malicious destinations.

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=us+healthcare+industry+report
    • http://files.dare2dreambigger.com/uploads/1/3/2/6/132681560/4055200.pdf
    • http://files.danitzaorendain.com/uploads/1/3/0/7/130775762/5022728.pdf
    • http://files.allezmag.co/uploads/1/3/0/7/130775126/kedibonigozet_lolubabemore_gamukemitotaj.pdf
    • http://files.gamutspanish.com/uploads/1/3/2/6/132682655/siwasurivum-najokamodiwero-fanej-gejexuxuwat.pdf
    • https://cdn.shopify.com/s/files/1/0430/3935/9127/files/gakafifo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/kobebegewepaku.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/mimodiralososazowi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/kedifozireva.pdf
    • https://cdn.shopify.com/s/files/1/0435/3854/6840/files/86862014651.pdf
    • https://cdn.shopify.com/s/files/1/0429/2008/3612/files/wogevujawu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gumuwajufutoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7494/4153/files/50912726249.pdf
    • https://cdn.shopify.com/s/files/1/0434/2261/3654/files/xulafigi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/90941724945.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/voxuvavofizizisatewuzatip.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/14254338557.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/37811103255.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/
    • https://cdn.shopify.com/s/files/1

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e23.bin
fad2c2b675599e5e3bfc3c9a8ed3bf66fa5688e28c1e04f7512b33468d8e37e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E23 5136 bytes
font_01_sfnt_off00007f8d.bin
8058b234d7abf33ef1e045b5b860ac17133a1f6cb7f0c97bd0cc82410c777568		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8D 10424 bytes

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