Malicious PDF — malware analysis report

Static analysis result for SHA-256 5545dd2a3c33e694…

MALICIOUS

PDF

45.5 KB Created: 2020-07-08 13:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3b926bf753b99534acce37e09fa12b0 SHA-1: 47793d89a31fd672e07c5d22cdabb5427a9b6d69 SHA-256: 5545dd2a3c33e694b8c9ba55a08c9948d76eacb401705aa96c6439f15d67a47c
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to lure users into downloading what appears to be a legitimate document, but it redirects to malicious infrastructure. The primary URL, https://ttraff.cc/wb?keyword=production%20planning%20and%20control%20sk%20mukhopadhyay%20pdf%20free%20download, is flagged as a malicious redirector. The document body text also contains numerous links to other PDF files hosted on various domains, suggesting a broad SEO poisoning or link farm strategy to distribute malicious content.

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.cc/wb?keyword=production%20planning%20and%20control%20sk%20mukhopadhyay%20pdf%20free%20download
    • http://files.thewaveindustries.com/uploads/1/3/1/4/131413837/a1b902b2.pdf
    • http://files.readwithmrsd.com/uploads/1/3/2/6/132682681/86cec62ab78af83.pdf
    • http://files.kitchengarten.net/uploads/1/3/1/6/131636914/mawifevaviraviw.pdf
    • http://files.cateringandcreations.net/uploads/1/3/0/8/130814513/9295549.pdf
    • http://files.tonypalermolifecoach.com/uploads/1/3/1/4/131437740/eaf0f757.pdf
    • http://files.blmslibrary.org/uploads/1/3/1/6/131606644/ebdfe5.pdf
    • http://files.selkicasarpg.com/uploads/1/3/1/6/131637057/8beeecc57.pdf
    • http://files.childrenareourspecialty.com/uploads/1/3/1/4/131409055/74836.pdf
    • https://mugitemos.files.wordpress.com/2020/06/xeguzaz.pdf
    • https://firixomov.files.wordpress.com/2020/06/25118831730.pdf
    • https://safixig.files.wordpress.com/2020/07/26592700595.pdf
    • https://fuzuzuzo.files.wordpress.com/2020/07/18599774243.pdf
    • https://gonotof.files.wordpress.com/2020/06/83377080851.pdf
    • https://sufikisakevi956131754.files.wordpress.com/2020/06/xoxaxa.pdf
    • https://tusivedugex.files.wordpress.com/2020/06/guviwufunenekowixu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b75.bin
8a49df4b4f459f010221b71bd0d1266d677f2d881407665532535e73e3e763f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B75 5708 bytes
font_01_sfnt_off00006ebc.bin
33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBC 2116 bytes
font_02_sfnt_off00007885.bin
9684a889e390f8a01506744b63860dd0cac0045c634f4351f906f1e0e288fa3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7885 14792 bytes

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