Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dfe0c263f1aef43…

MALICIOUS

PDF

42.1 KB Created: 2020-08-04 23:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab9e7b36f8070fe74b1b9dfb1b10e4d7 SHA-1: c3d679c28fd32cc36a36d0a0b48d70e3298968cb SHA-256: 1dfe0c263f1aef43c986c199891da223dc3152b81e395bc48eb9b89746ec3177
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=classification+of+clastic+sedimentary+rocks+pdf', is identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'classification of clastic sedimentary rocks pdf' and mentions 'wkhtmltopdf', suggesting a lure to download or view a PDF. The presence of numerous external links and a malicious redirector indicates a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=classification+of+clastic+sedimentary+rocks+pdf
    • http://files.smoothpool.com/uploads/1/3/1/3/131380616/jewepokusoba.pdf
    • http://files.emiliomoralesmusic.com/uploads/1/3/2/6/132681812/0cde4afa20c3b8.pdf
    • http://files.support.famhealth.com/uploads/1/3/1/4/131437740/3357936.pdf
    • http://files.dekalbtrailblazers.org/uploads/1/3/1/8/131858540/87cbcddf.pdf
    • https://cdn.shopify.com/s/files/1/0437/6218/8449/files/70682466717.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/skim_reader.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/25088343678.pdf
    • https://cdn.shopify.com/s/files/1/0434/4823/8241/files/suxovotukefalenulitemokil.pdf
    • https://cdn.shopify.com/s/files/1/0433/1978/7675/files/atm_cmachine_new_balance_java.pdf
    • https://cdn.shopify.com/s/files/1/0436/2669/2771/files/bebufakepufela.pdf
    • https://cdn.shopify.com/s/files/1/0429/2011/6387/files/48461226353.pdf
    • https://cdn.shopify.com/s/files/1/0433/6546/6270/files/barnes_reloading_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/kujupawasukomof.pdf
    • https://cdn.shopify.com/s/files/1/0432/0064/3236/files/26283742322.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_off00006662.bin
5dc28c82af11eb7178cd34a88b511e88b5f1ab5f85a0a7a70aa1b0f30f66865b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6662 5372 bytes
font_01_sfnt_off0000789a.bin
851270151de86205fad4a8d86235cfeb7457bf33f6d538e3b3984a3f613311cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789A 10240 bytes

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