Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e00c4cbe8f95503…

MALICIOUS

PDF

43.1 KB Created: 2020-08-20 21:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4a317e435576200a17a1462630a486d SHA-1: 59829768a6c2f715313d2ecb45b04ce740b94a16 SHA-256: 4e00c4cbe8f955035633046f4367f9d5cfa0d857acf7558557837f8e9ffde30e
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to further malicious content. The document body, though heavily obfuscated, contains the same keyword as the redirector URL, suggesting a thematic lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy to potentially improve SEO or distribute malicious content. No scripts were extracted, but the primary malicious behavior observed is the redirection to a harmful URL.

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.com/pify?keyword=cinderella+transformation+dress+hire
    • http://detafit.louisvilleccc.org/uploads/1/3/1/3/131380183/91dac6b75bd.pdf
    • http://lugedu.royalyogablissfield.com/uploads/1/3/1/1/131164312/livime.pdf
    • https://cdn.shopify.com/s/files/1/0435/5070/3779/files/pufalujiwipot.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2645/files/jukibos.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/the_pale_lady_dumas.pdf
    • https://cdn.shopify.com/s/files/1/0433/2696/3865/files/don_juan_poem.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/6159930914.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77636621448.pdf
    • https://cdn.shopify.com/s/files/1/0429/8620/9439/files/xomagusewej.pdf
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/riviwilowan.pdf
    • https://cdn.shopify.com/s/files/1/0435/1619/9066/files/garden_answer_fall.pdf
    • https://cdn.shopify.com/s/files/1/0433/1978/7675/files/36643035458.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_off00006d3c.bin
51a6a27c71b83c3da611e5ae8a5a81e5f0020cec66017da21e3c5b05eaf006db
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3C 5052 bytes
font_01_sfnt_off00007e33.bin
623a382ce95baea3b2869feff3498a29186d1659633c76a3c49d2440cd04579e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E33 9908 bytes