Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bd9d2e866df19c3…

MALICIOUS

PDF

37.3 KB Created: 2020-08-24 07:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6b85fdaa9d31665268d415d76670e70 SHA-1: c4737ea5640aba61b3f444f6ec7413be19406263 SHA-256: 8bd9d2e866df19c3160f94c04954aa5df57e4c28622eabf8e815de3ae8da1668
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, a common tactic for SEO poisoning or link farms. One of these links, 'https://ttraff.cc/pify?keyword=wapking+movies+2019', is identified as a known malicious redirector. This suggests the document is intended to lure users to malicious sites, likely for phishing or malware distribution. No scripts were extracted, and the document body was heavily obfuscated.

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=wapking+movies+2019
    • http://files.shaolinkungfuflemington.com/uploads/1/3/1/6/131606291/rijolotef-jugewunukofu-kagolatuwi.pdf
    • http://files.soullevelastrology.com/uploads/1/3/1/0/131070161/f0cff5cf8f8.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/borosunekarekaxubena.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/fekozegetozusudo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/bible_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/1471/5549/files/76379973346.pdf
    • https://cdn.shopify.com/s/files/1/0430/3260/8921/files/agriculture_marketing_agrimoon.pdf
    • https://cdn.shopify.com/s/files/1/0439/3022/2747/files/nejagagud.pdf
    • https://cdn.shopify.com/s/files/1/0440/9583/2216/files/28950316134.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59022585862.pdf
    • https://cdn.shopify.com/s/files/1/0431/2091/8679/files/fegiwegeja.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3873/files/pexobogani.pdf
    • https://cdn.shopify.com/s/files/1/0435/7442/7806/files/111969982.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_off00005288.bin
1dd5dcf7d824d75785d261377b1a8b549de2aca459a0f1319b8806c898c11910
pdf-font-stream PDF embedded font (sfnt) at offset 0x5288 5628 bytes
font_01_sfnt_off000065be.bin
469d5cb48ebb91d34a9a778972b68d161a629807471b0a133f6d80aea33e0ac6
pdf-font-stream PDF embedded font (sfnt) at offset 0x65BE 10316 bytes