Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa16f19304c694da…

MALICIOUS

PDF

61.3 KB Created: 2020-09-20 19:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfe6d46f5083229620b2241b924ddd6b SHA-1: b5aca9a204333d13c6725dad42d8c4a5f5bd3642 SHA-256: fa16f19304c694da8fffdb053d05e0afe5edf1b7d65d58d8c3656bcea2f2b70f
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches one of the extracted malicious links. The primary intent appears to be directing the user to a malicious site for further exploitation or phishing. No scripts were extracted from this sample.

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.club/wix?keyword=sworn+statement+army+example
    • http://files.stavtech.co.uk/uploads/1/3/1/3/131379443/dd7436858a992f9.pdf
    • http://files.andreab4me.com/uploads/1/3/2/6/132681832/tuluvefatirole.pdf
    • http://xubokuj.islandverse.com/uploads/1/3/1/3/131379444/5766601.pdf
    • http://rewilul.wstcharity.com/uploads/1/3/1/6/131606295/sureme_xekoz_tufigunonoz.pdf
    • http://files.modestoslamnjam.com/uploads/1/3/1/4/131438464/kikopu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4015/1454/files/48494506628.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/ranorosita.pdf
    • https://3045715f-0b76-4f19-a4ff-6581fd7db0c4.filesusr.com/ugd/39a0fd_d634006f24174c60aa7acdf8b97057f2.pdf?index=true
    • https://ec7d5e77-00c0-4a30-b8ea-88def8ab8879.filesusr.com/ugd/eb6612_990241b926ab448e89c3fa275371c006.pdf?index=true
    • https://caf6ae99-1493-40cf-ae46-b7a47df59414.filesusr.com/ugd/f7fbc8_4e2b7cce632b45558c9989a4b00a6c27.pdf?index=true
    • https://b37126c3-5723-491e-a4d5-584b1a8f42e1.filesusr.com/ugd/e4a001_3391e09c468f46d69e0a21787d9bf49d.pdf?index=true
    • https://e13531f5-3217-4b59-b6c6-bb1f94ee9ab7.filesusr.com/ugd/4b874d_64d91ad463df4b6f870e36cee2548349.pdf?index=true
    • 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_off0000b036.bin
74c995be95dec59b09488d37776f52304ca7dd05abdc2b847283657088131cf2
pdf-font-stream PDF embedded font (sfnt) at offset 0xB036 5328 bytes
font_01_sfnt_off0000c25a.bin
36c2156c3194c200fa8039f8d10d11eee6072cfd8e77d2ff3292ca0a82eb2ff5
pdf-font-stream PDF embedded font (sfnt) at offset 0xC25A 11140 bytes