Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f192ed30895747…

MALICIOUS

PDF

43.1 KB Created: 2020-08-22 11:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1badc697ada00b240afa5e8ade96baa0 SHA-1: e8d17750fe2f64b013b028b4b357e8d9ff68ee83 SHA-256: 58f192ed30895747e4c8e0882c2ffd134ed667b89b67e110c24c5455260b590e
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users to click on these links, which likely lead to malicious sites for phishing or malware delivery. No scripts were extracted, and the document body is largely unreadable binary data.

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=que+pasa+en+la+anemia+falciforme
    • http://jopadaso.devotamath.com/uploads/1/3/2/7/132712358/sojixoto-wiseko.pdf
    • http://files.superstarcomedy.net/uploads/1/3/0/8/130874514/wojipo_nupudijo_nixolufudawibu_telaxifevoj.pdf
    • http://files.marialongmireartandphotography.ca/uploads/1/3/0/8/130814216/dusisodu.pdf
    • http://files.jennabradshaw.com/uploads/1/3/0/7/130739204/xaxixifikibamoxatiwi.pdf
    • http://beturazuz.coregenichse.co.uk/uploads/1/3/1/4/131453540/karaxenemoledolaref.pdf
    • https://cdn.shopify.com/s/files/1/0430/6268/9946/files/acme_thread_dimensions.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/data_security_and_privacy_in_cloud_computing.pdf
    • https://cdn.shopify.com/s/files/1/0432/4186/5384/files/talobivezesuxedisupesur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dovaxetudomorunuk.pdf
    • https://cdn.shopify.com/s/files/1/0440/6883/1382/files/59058234019.pdf
    • https://cdn.shopify.com/s/files/1/0439/1088/9624/files/vifome.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6970/files/da_form_5500.pdf
    • https://cdn.shopify.com/s/files/1/0434/3844/0598/files/xamufadabolototebo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8943/6580/files/filepapir.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4379/files/gukodadobuzozofobasupod.pdf
    • https://cdn.shopify.com/s/files/1/0436/8610/1145/files/socio_ecological_model_of_health.pdf
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/31298602806.pdf
    • https://cdn.shopify.com/s/files/1/0435/3176/3864/files/31989592829.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_off000067bd.bin
8044b20f8c209a8c2f5103bac5580a56b891632b7825e4808a126493e026c9b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BD 5224 bytes
font_01_sfnt_off00007965.bin
edcd2b1d11cddc2906c469910979150b65bb9bca9df43e6feb2bf38513ce0bde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7965 11100 bytes

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