Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef5f3e366a1e565…

MALICIOUS

PDF

53.1 KB Created: 2020-07-29 19:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b918e0ab7cb4731dec602570865b8ea SHA-1: 4288193ca10dd716bc4563fe6fa93d814872c3b0 SHA-256: 1ef5f3e366a1e565010c711de9933f56e9fbf2fc11eb7c23da8dcf8614ab0185
152 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 redirects through a known malicious redirector (ttraff.cc). The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, appears to contain metadata related to PDF generation and potentially SEO-optimized content, suggesting a tactic to disguise malicious links within seemingly relevant documents.

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=determination+of+calorific+value+by+bomb+calorimeter+pdf
    • http://files.mooneward.com/uploads/1/3/2/8/132815365/wenefavafosafin.pdf
    • http://files.griffinukuleles.com/uploads/1/3/0/8/130814208/buxinoturileremigina.pdf
    • http://files.shaydanielle.com/uploads/1/3/0/7/130775588/8083494.pdf
    • http://files.seashellsandlemons.com/uploads/1/3/1/4/131483336/cd734186db84.pdf
    • http://files.mastertradesmen.co.uk/uploads/1/3/1/4/131407423/5641990.pdf
    • http://files.mooneward.com/uploads/1/3/2/8/132815365/wenefavafosafin
    • https://cdn.shopify.com/s/files/1/0433/9220/4950/files/zawigebamufalarokales.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5632/files/fibiwofilepamo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53940391871.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/58931754685.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/87693602150.pdf
    • https://cdn.shopify.com/s/files/1/0431/7796/7776/files/nizomabu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5408/files/18522788199.pdf
    • https://cdn.shopify.com/s/files/1/0433/9492/4694/files/57678295703.pdf
    • https://cdn.shopify.com/s/files/1/0428/5435/1015/files/timisenidixiwisetunajok.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/17617224239.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/27691685451.pdf
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/xatutu.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_off00008a76.bin
e9544f82ae4d24e36e9902757775cb448cfc814450811049b8e1332678bf220f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A76 5308 bytes
font_01_sfnt_off00009c71.bin
b9c16f0e736d2b4a6345a0b8cf653ba34767188aa21a25312bbee1fe35244697		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C71 13520 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.