Malicious PDF — malware analysis report

Static analysis result for SHA-256 c55f37234c96417e…

MALICIOUS

PDF

55.4 KB Created: 2020-08-09 04:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faa7bc4d54f85db1ac86a15c0d60f139 SHA-1: c8a301d75f7bb1715669883c742aef5843c450fa SHA-256: c55f37234c96417e60941d23a87d7fd65d78147abff6d2d1892afe1c3563f2cb
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection strategy. One prominent URL, https://ttraff.com/pify?keyword=the+1945+manchester+pan+african+congress+revisited+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The ML classifier strongly flagged this PDF as malicious.

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=the+1945+manchester+pan+african+congress+revisited+pdf
    • http://files.frostbottomstudio.com/uploads/1/3/1/8/131871864/lizodegex-xisuzibirepexa.pdf
    • http://files.danrednermusic.com/uploads/1/3/1/4/131437886/22e01a4d8.pdf
    • http://files.shaloha4u.com/uploads/1/3/1/3/131382595/dawosuso-namalupun-movolebedipi.pdf
    • http://guzolefaf.olddouneroadnursery.com/uploads/1/3/0/7/130738799/9e8c3068b9aa0.pdf
    • http://files.calliemetlersmith.com/uploads/1/3/1/3/131398164/zefifivorovog.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/89097885088.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/62772018161.pdf
    • https://cdn.shopify.com/s/files/1/0434/6521/2066/files/water_pollution_act_1974.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vinufew.pdf
    • https://cdn.shopify.com/s/files/1/0433/6405/7238/files/98918645261.pdf
    • https://cdn.shopify.com/s/files/1/0430/5505/5002/files/35175169184.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2305/files/sojeruv.pdf
    • https://cdn.shopify.com/s/files/1/0436/4192/9886/files/feguwefikezirifozomumu.pdf
    • https://cdn.shopify.com/s/files/1/0448/0453/8528/files/syllogism_in_reasoning.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/97246925398.pdf
    • https://cdn.shopify.com/s/files/1/0431/1062/9532/files/navixepokexumu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2308/0344/files/21636634701.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_off00009443.bin
91a2088c8858de2e83c71103113c2466e0938d557ea3e9f5a78030f788db3da6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9443 5964 bytes
font_01_sfnt_off0000a87d.bin
3d6b4c486ecfe5558cc1ebc92a352df8407a36c031eee30dde91dd7991270ace		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA87D 12272 bytes

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