Malicious PDF — malware analysis report

Static analysis result for SHA-256 0592db8ac37f2cb8…

MALICIOUS

PDF

41.6 KB Created: 2020-08-23 13:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06924390cb4c4be76b84aed8cf4c9fcc SHA-1: 660ae0c52f82eb280dad9406694280dc21285894 SHA-256: 0592db8ac37f2cb8443a6ca18658d18282c48f892202fa29e69ed21cea41e61a
154 Risk Score

Malware Insights

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

The PDF contains embedded links designed to redirect users to malicious infrastructure, specifically to 'https://ttraff.com/pify?keyword=archeage+begins+mod+apk'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure for users seeking game modifications. The presence of numerous other PDF links further indicates a link farm strategy, likely to improve search engine ranking for malicious content.

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=archeage+begins+mod+apk
    • http://files.thehappypaintbrush.com/uploads/1/3/1/1/131163904/pefoxora.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6348/4315/files/92035147859.pdf
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/65405682994.pdf
    • https://cdn.shopify.com/s/files/1/0434/4083/2678/files/bosch_security_systems_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/83343452442.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/gafafug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21096031872.pdf
    • https://cdn.shopify.com/s/files/1/0430/4535/5682/files/i_ll_follow_you_deep_sea_baby.pdf
    • https://cdn.shopify.com/s/files/1/0434/9621/0594/files/31182786494.pdf
    • https://cdn.shopify.com/s/files/1/0434/2913/4501/files/51493690276.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7256/files/16201000721.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8357/files/jewigi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3541/0077/files/marginal_distribution_joint.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_off0000636f.bin
144bef26f4d84e2cefa6aab683cacb3f738e6ab1c9d4bdfefe9bb5fa8badc6b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x636F 5648 bytes
font_01_sfnt_off00007672.bin
d9750e7f4bf770ca6a38dae7b71c64fc7f8084bb4c7ba1b08448167be2e04ec0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7672 10360 bytes