Malicious PDF — malware analysis report

Static analysis result for SHA-256 177bc6a76b344095…

MALICIOUS

PDF

46.9 KB Created: 2020-09-07 02:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9cf953184030352bd0ef92bde40cf91 SHA-1: 1e49f6055d25ea462459efbf7b5bc6a0917de1d3 SHA-256: 177bc6a76b3440955529ce8c66fb886636d8781baea8fdb34e467ba2aa9379a6
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, forming a link farm. One of the primary links directs to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to drive traffic to malicious infrastructure.

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.me/wix?keyword=enterobacteriaceae+and+coliform
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/595093_d207d1766a0d4090aa9c5146b5770ff3.pdf
    • https://static.usrfiles.com/ugd/455f95_bf0d58d263cd453dbf85898779443eba.pdf
    • https://static.usrfiles.com/ugd/b8c837_51197fdf1b66401fa2e594a0b083834c.pdf
    • https://static.usrfiles.com/ugd/8c0e65_e4dc353a74b1475382b5f466e9c5e5ff.pdf
    • https://cdn.shopify.com/s/files/1/0435/0348/5092/files/gafuxufu.pdf
    • https://cdn.shopify.com/s/files/1/0440/3838/9925/files/29545210776.pdf
    • https://cdn.shopify.com/s/files/1/0428/6968/6431/files/25719178510.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2690/files/wukogigikoruzab.pdf
    • https://cdn.shopify.com/s/files/1/0430/8123/6634/files/3d_exporter.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6379/files/putesufi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6579/3942/files/anemia_free_download.pdf
    • https://static.usrfiles.com/ugd/40b9e6_01a2328c60644f6dad9349fe1b749ad3.pdf
    • https://static.usrfiles.com/ugd/5e8de6_25d0c8b6db9e4aaf9e3116f931e10333.pdf
    • https://static.usrfiles.com/ugd/77d535_b5dc7f4650664f44a0bbd03d40f5aff1.pdf
    • https://static.usrfiles.com/ugd/405339_ea0d64dfab6043aa8269f30a0b71c6c5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cfd.bin
1df65be563bdbab3c53277d0d8e7579740018beebc9ed8f8f974dd285c051d45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFD 4876 bytes
font_01_sfnt_off00007d6e.bin
1fd6b1c3ee61b217d310909447df261481f53147a4081253bf74d804d8e26d8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6E 10192 bytes
font_02_sfnt_off0000a045.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA045 4324 bytes

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