Malicious PDF — malware analysis report

Static analysis result for SHA-256 1306bacfe6c1f415…

MALICIOUS

PDF

57.0 KB Created: 2020-07-30 00:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 223b5b7e9a0e0d9b21fa937bdd68a42d SHA-1: ced96aeaaee48f09b1551baa6738fd1d898849cf SHA-256: 1306bacfe6c1f415b9ed5298bd7c68d10ced2138de5f7690323fa544529dcbfd
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with one identified as a malicious redirector. The ML classifier also flagged the PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings strongly suggest an attempt to redirect the user to malicious content, likely for phishing or malware delivery.

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=pdf+amandemen+1945
    • http://files.jeebdesignfishers.com/uploads/1/3/1/0/131070317/9aad042.pdf
    • http://files.bloomingdalecorporatecenter.com/uploads/1/3/1/0/131070572/tavenarugas.pdf
    • http://files.jandltravel.com/uploads/1/3/2/7/132740204/mufajijoro.pdf
    • http://files.ebonydeecheyne.com/uploads/1/3/0/7/130775583/boxexoxalulenez-zifowozujo-jatimajijoko-xebobenin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/32186379067.pdf
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/gefavizadarovomeve.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/38877586365.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50036278562.pdf
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/suzalibuxojarotilajew.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/vedoteketu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/82208713628.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/11961160391.pdf
    • https://cdn.shopify.com/s/files/1/0434/4633/7693/files/salakumapufinusarekigetog.pdf
    • https://cdn.shopify.com/s/files/1/0431/0633/6930/files/3527112212.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9138/files/nefaxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/16709531504.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8795/files/zosewufesufodunelul.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_off0000a407.bin
af59bf19ede256fdcce457325c37e52813d0033f34efa6859e9f57dfbf9b993d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA407 4716 bytes
font_01_sfnt_off0000b3fc.bin
2a358fdb7d02e5339b452d50bc3ae40ee1fd5db2e2f26d0c4549fe6f1bc9de5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3FC 10312 bytes

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