Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ef04f232d701a0…

MALICIOUS

PDF

44.0 KB Created: 2020-08-15 01:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbbf8dc78ffb94cddf3421b7337efc4b SHA-1: c9b306970f9986a854e0b32719fc61b1455c6efc SHA-256: 04ef04f232d701a0f3c107ff053d307c4621944f3a9e062386edba7a0c772843
162 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Java code to file from sharepoint'. The presence of a link farm and a malicious redirector strongly suggests an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting. No scripts were extracted, but the PDF structure and embedded links are sufficient evidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=java+code+to++file+from+sharepoint
    • http://zowotab.mainehypnotistsngh.com/uploads/1/3/0/7/130738714/81533c779a59522.pdf
    • http://files.sthilaryhouse.co.uk/uploads/1/3/1/6/131636889/mubumaribiminatores.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8896/0919/files/wokuverenos.pdf
    • https://cdn.shopify.com/s/files/1/0435/2658/6527/files/79098044789.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/caesars_rewards_mobile_app.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/identity_malta_position_description_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/9729/2949/files/nupoxenezogobejixafizofa.pdf
    • https://cdn.shopify.com/s/files/1/0440/1653/3654/files/mukhyamantri_awas_yojana_up_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/9564449428.pdf
    • https://cdn.shopify.com/s/files/1/0434/1940/2397/files/koxivubozumibugumudabuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/8872/4639/files/perirofitobokuratib.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/benefits_of_franchising.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5650/files/65761065032.pdf
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/derpy_minecraft_skin.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_off00006335.bin
139f0e32d3e4f1bd84d33cbef49d4efd9d97e5ac930c8d63eb49af10189a23f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6335 5444 bytes
font_01_sfnt_off0000758f.bin
f3566d74453c9379a1ba4543724a622d3a4b3c99ddcb1b9f713c7af5b811fc66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x758F 14636 bytes

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