Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d861be968bd3c5…

MALICIOUS

PDF

42.0 KB Created: 2020-08-08 08:00:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cec26809a1c1a19b3f5c22c1785b6973 SHA-1: b1a7642e08e34278db71dc50093ab39726f5eda9 SHA-256: d9d861be968bd3c56ea622fad125930003d5031f1663bb69f1a74c5653b06225
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to '2020 calendar printable pdf telugu' and the malicious URL, suggesting a lure to trick users into clicking. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=2020+calendar+printable+pdf+telugu
    • http://files.combatveteranswithptsd.org/uploads/1/3/1/6/131606431/panixoj-gajiponutojemo.pdf
    • http://files.celshomes.com/uploads/1/3/1/4/131483148/xozozuxovifanusodib.pdf
    • http://files.tfsonorientation.com/uploads/1/3/1/4/131455141/e64f7321895245f.pdf
    • http://files.refugedajourney.com/uploads/1/3/2/6/132681767/nalive.pdf
    • http://files.orderppl.com/uploads/1/3/0/7/130740521/besomodol-duganuwunixuxiw-nemerolezinanex.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/79349451556.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2138/files/fl_studio_12_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/34096463036.pdf
    • https://cdn.shopify.com/s/files/1/0429/5609/5644/files/mulusujopiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/5887/8872/files/athenaze_book_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0437/files/sizatexaxatumevomer.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4098/files/zirokututitaxifezoxije.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/99789991.pdf
    • https://cdn.shopify.com/s/files/1/0429/3761/4499/files/cateter_umbilical_cuidados_de_enfermeria.pdf
    • https://cdn.shopify.com/s/files/1/0440/4068/3685/files/farm_pro_2420_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/bamozuzateziwikajutu.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_off0000654f.bin
eec4b8b52ee198fbe1391c525dbcde41d7adb5576418f121a1f4e96967f5225d
pdf-font-stream PDF embedded font (sfnt) at offset 0x654F 5464 bytes
font_01_sfnt_off000077eb.bin
a8810755871f00c8ac6e50ccde76899c67a0419d0f1217322eb1ba24254ec4a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x77EB 10316 bytes