Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc32e4b68c88a23a…

MALICIOUS

PDF

36.7 KB Created: 2020-08-28 01:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f866c4d0ad724352cdd6b86a33b8a392 SHA-1: 303f83f4927e0e067bd3385c96be414d14dcef3e SHA-256: cc32e4b68c88a23acd035d27b9f07a6552cc5f212a2c99e5b2e8ba0106c15382
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious link identified is https://ttraff.cc/pify?keyword=erick+sermon+vernia+download, which is likely used to direct users to further malicious content. The presence of numerous Shopify-hosted PDF links suggests an attempt to create a link farm for SEO manipulation or to obscure the true destination.

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=erick+sermon+vernia+download
    • http://wavug.centraldrivewaysstratford.co.uk/uploads/1/3/0/9/130969260/toxido_baragolakobalu_vateve.pdf
    • http://files.thehappypaintbrush.com/uploads/1/3/1/1/131163904/pefoxora.pdf
    • http://files.hornbillafricansafaris.com/uploads/1/3/2/8/132816202/4790130.pdf
    • http://nematise.chanteruss.com/uploads/1/3/0/7/130775732/3538982.pdf
    • http://files.pinaybeauteusabybeautederm.com/uploads/1/3/2/6/132695887/8239594.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3329/files/startup_incubator_business_model.pdf
    • https://cdn.shopify.com/s/files/1/0437/5897/7178/files/bearing_catalogue_skf.pdf
    • https://cdn.shopify.com/s/files/1/0440/2066/2422/files/86132796895.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/reragijod.pdf
    • https://cdn.shopify.com/s/files/1/0433/2896/2715/files/kodefubolevev.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/57202586458.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/types_of_anthropometric_measurements.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/69022213788.pdf
    • https://cdn.shopify.com/s/files/1/0433/5563/5880/files/21205016726.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6564/files/koxirek.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_off000050fa.bin
81b423ec8edd58418c9ace3ea96723851096bdefbc74fa4eff8fe06de5bc1ae9
pdf-font-stream PDF embedded font (sfnt) at offset 0x50FA 5260 bytes
font_01_sfnt_off000062d9.bin
fdabff3215d663cbea26aee5b1ca326756b7256913a9c342afed0b4e89dd3c87
pdf-font-stream PDF embedded font (sfnt) at offset 0x62D9 10264 bytes